74287664 has 20 divisors (see below), whose sum is σ = 157017480. Its totient is φ = 33767040.

The previous prime is 74287643. The next prime is 74287679. The reversal of 74287664 is 46678247.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210869 + ... + 211220.

It is an arithmetic number, because the mean of its divisors is an integer number (7850874).

Almost surely, 2^74287664 is an apocalyptic number.

It is an amenable number.

74287664 is an abundant number, since it is smaller than the sum of its proper divisors (82729816).

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

74287664 is a wasteful number, since it uses less digits than its factorization.

74287664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422108 (or 422102 counting only the distinct ones).

The product of its digits is 451584, while the sum is 44.

The square root of 74287664 is about 8619.0291796698. The cubic root of 74287664 is about 420.3769556048.

The spelling of 74287664 in words is "seventy-four million, two hundred eighty-seven thousand, six hundred sixty-four".