74996520 has 128 divisors (see below), whose sum is σ = 241315200. Its totient is φ = 18579456.

The previous prime is 74996513. The next prime is 74996531. The reversal of 74996520 is 2569947.

It is a super-2 number, since 2×74996520² = 11248956024220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197691 + ... + 198069.

It is an arithmetic number, because the mean of its divisors is an integer number (1885275).

Almost surely, 2^74996520 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 74996520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120657600).

74996520 is an abundant number, since it is smaller than the sum of its proper divisors (166318680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74996520 is a wasteful number, since it uses less digits than its factorization.

74996520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 74996520 is about 8660.0531176200. The cubic root of 74996520 is about 421.7098100040.

The spelling of 74996520 in words is "seventy-four million, nine hundred ninety-six thousand, five hundred twenty".