74715920 has 20 divisors (see below), whose sum is σ = 173714700. Its totient is φ = 29886336.

The previous prime is 74715881. The next prime is 74715973. The reversal of 74715920 is 2951747.

It can be written as a sum of positive squares in 2 ways, for example, as 29986576 + 44729344 = 5476^2 + 6688^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466895 + ... + 467054.

It is an arithmetic number, because the mean of its divisors is an integer number (8685735).

Almost surely, 2^74715920 is an apocalyptic number.

It is an amenable number.

74715920 is an abundant number, since it is smaller than the sum of its proper divisors (98998780).

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

74715920 is a wasteful number, since it uses less digits than its factorization.

74715920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933962 (or 933956 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 74715920 is about 8643.8371109132. The cubic root of 74715920 is about 421.1832093034.

The spelling of 74715920 in words is "seventy-four million, seven hundred fifteen thousand, nine hundred twenty".