| Base | Representation |
|---|---|
| bin | 1001100100111… |
| … | …1110001100000 |
| 3 | 2210120222111120 |
| 4 | 2121033301200 |
| 5 | 40241011030 |
| 6 | 3553012240 |
| 7 | 665314254 |
| oct | 231176140 |
| 9 | 83528446 |
| 10 | 40172640 |
| 11 | 20749332 |
| 12 | 11554080 |
| 13 | 84272c1 |
| 14 | 549a264 |
| 15 | 37d8010 |
| hex | 264fc60 |
40172640 has 96 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 10612224.
The previous prime is 40172633. The next prime is 40172641. The reversal of 40172640 is 4627104.
It is a tau number, because it is divible by the number of its divisors (96).
It is a super-2 number, since 2×401726402 = 3227682009139200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a self number, because there is not a number n which added to its sum of digits gives 40172640.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (40172641) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60631 + ... + 61289.
It is an arithmetic number, because the mean of its divisors is an integer number (1330560).
Almost surely, 240172640 is an apocalyptic number.
40172640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 40172640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63866880).
40172640 is an abundant number, since it is smaller than the sum of its proper divisors (87561120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
40172640 is a wasteful number, since it uses less digits than its factorization.
40172640 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 804 (or 796 counting only the distinct ones).
The product of its (nonzero) digits is 1344, while the sum is 24.
The square root of 40172640 is about 6338.1890157994. The cubic root of 40172640 is about 342.4865002582.
Adding to 40172640 its reverse (4627104), we get a palindrome (44799744).
The spelling of 40172640 in words is "forty million, one hundred seventy-two thousand, six hundred forty".
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