74989644 has 24 divisors (see below), whose sum is σ = 177192960. Its totient is φ = 24679824.

The previous prime is 74989643. The next prime is 74989657. The reversal of 74989644 is 44698947.

It is not an unprimeable number, because it can be changed into a prime (74989643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38604 + ... + 40499.

It is an arithmetic number, because the mean of its divisors is an integer number (7383040).

Almost surely, 2^74989644 is an apocalyptic number.

It is an amenable number.

74989644 is an abundant number, since it is smaller than the sum of its proper divisors (102203316).

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

74989644 is a wasteful number, since it uses less digits than its factorization.

74989644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79189 (or 79187 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 74989644 is about 8659.6561132645. The cubic root of 74989644 is about 421.6969215603.

The spelling of 74989644 in words is "seventy-four million, nine hundred eighty-nine thousand, six hundred forty-four".