Base | Representation |
---|---|
bin | 1000110101101… |
… | …01101110000000 |
3 | 12011111221022210 |
4 | 10122311232000 |
5 | 122440112030 |
6 | 11205102120 |
7 | 1560135063 |
oct | 432655600 |
9 | 164457283 |
10 | 74144640 |
11 | 38941a69 |
12 | 209b7940 |
13 | 1249018b |
14 | 9bc08da |
15 | 6798bb0 |
hex | 46b5b80 |
74144640 has 192 divisors, whose sum is σ = 250442640. Its totient is φ = 18653184.
The previous prime is 74144639. The next prime is 74144671. The reversal of 74144640 is 4644147.
It is a tau number, because it is divible by the number of its divisors (192).
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a junction number, because it is equal to n+sod(n) for n = 74144598 and 74144607.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1015644 + ... + 1015716.
Almost surely, 274144640 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 74144640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125221320).
74144640 is an abundant number, since it is smaller than the sum of its proper divisors (176298000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
74144640 is a wasteful number, since it uses less digits than its factorization.
74144640 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 141 (or 106 counting only the distinct ones).
The product of its (nonzero) digits is 10752, while the sum is 30.
The square root of 74144640 is about 8610.7281922030. The cubic root of 74144640 is about 420.1070022155.
Adding to 74144640 its reverse (4644147), we get a palindrome (78788787).
The spelling of 74144640 in words is "seventy-four million, one hundred forty-four thousand, six hundred forty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.064 sec. • engine limits •