74931988 has 12 divisors (see below), whose sum is σ = 138844692. Its totient is φ = 35262080.

The previous prime is 74931979. The next prime is 74932003. The reversal of 74931988 is 88913947.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44328964 + 30603024 = 6658^2 + 5532^2 .

It is a super-2 number, since 2×74931988² = 11229605651264288, which contains 22 as substring.

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, 550903 + ... + 551038.

It is an arithmetic number, because the mean of its divisors is an integer number (11570391).

Almost surely, 2^74931988 is an apocalyptic number.

It is an amenable number.

74931988 is a deficient number, since it is larger than the sum of its proper divisors (63912704).

74931988 is a wasteful number, since it uses less digits than its factorization.

74931988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101962 (or 1101960 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 74931988 is about 8656.3264725864. The cubic root of 74931988 is about 421.5888195603.

The spelling of 74931988 in words is "seventy-four million, nine hundred thirty-one thousand, nine hundred eighty-eight".