Base | Representation |
---|---|
bin | 1001100010101… |
… | …0110000110100 |
3 | 2210022021112220 |
4 | 2120222300310 |
5 | 40221133134 |
6 | 3545442340 |
7 | 664113300 |
oct | 230526064 |
9 | 83267486 |
10 | 40021044 |
11 | 20655448 |
12 | 114a03b0 |
13 | 83a32bb |
14 | 545ad00 |
15 | 37a8149 |
hex | 262ac34 |
40021044 has 72 divisors (see below), whose sum is σ = 112422240. Its totient is φ = 11035584.
The previous prime is 40021021. The next prime is 40021061. The reversal of 40021044 is 44012004.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15879 + ... + 18225.
It is an arithmetic number, because the mean of its divisors is an integer number (1561420).
Almost surely, 240021044 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 40021044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56211120).
40021044 is an abundant number, since it is smaller than the sum of its proper divisors (72401196).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
40021044 is a wasteful number, since it uses less digits than its factorization.
40021044 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2397 (or 2388 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 15.
The square root of 40021044 is about 6326.2187758566. The cubic root of 40021044 is about 342.0551533772.
Adding to 40021044 its reverse (44012004), we get a palindrome (84033048).
The spelling of 40021044 in words is "forty million, twenty-one thousand, forty-four".
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