74989512 has 96 divisors (see below), whose sum is σ = 220966200. Its totient is φ = 22837248.

The previous prime is 74989511. The next prime is 74989517. The reversal of 74989512 is 21598947.

It can be written as a sum of positive squares in 4 ways, for example, as 14243076 + 60746436 = 3774^2 + 7794^2 .

Its product of digits (181440) is a multiple of the sum of its prime divisors (840).

It is not an unprimeable number, because it can be changed into a prime (74989511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105414 + ... + 106122.

Almost surely, 2^74989512 is an apocalyptic number.

74989512 is a gapful number since it is divisible by the number (72) 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 74989512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110483100).

74989512 is an abundant number, since it is smaller than the sum of its proper divisors (145976688).

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

74989512 is a wasteful number, since it uses less digits than its factorization.

74989512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 840 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 74989512 is about 8659.6484917114. The cubic root of 74989512 is about 421.6966741305.

The spelling of 74989512 in words is "seventy-four million, nine hundred eighty-nine thousand, five hundred twelve".