74720512 has 18 divisors (see below), whose sum is σ = 149149658. Its totient is φ = 37360128.

The previous prime is 74720497. The next prime is 74720519. The reversal of 74720512 is 21502747.

It can be written as a sum of positive squares in only one way, i.e., 59228416 + 15492096 = 7696^2 + 3936^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74720519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145683 + ... + 146194.

Almost surely, 2^74720512 is an apocalyptic number.

It is an amenable number.

74720512 is a deficient number, since it is larger than the sum of its proper divisors (74429146).

74720512 is an equidigital number, since it uses as much as digits as its factorization.

74720512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291893 (or 291879 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 74720512 is about 8644.1027296070. The cubic root of 74720512 is about 421.1918376907.

The spelling of 74720512 in words is "seventy-four million, seven hundred twenty thousand, five hundred twelve".