74656240 has 40 divisors (see below), whose sum is σ = 176528880. Its totient is φ = 29354496.

The previous prime is 74656223. The next prime is 74656261. The reversal of 74656240 is 4265647.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 74656196 and 74656205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3189 + ... + 12628.

It is an arithmetic number, because the mean of its divisors is an integer number (4413222).

Almost surely, 2^74656240 is an apocalyptic number.

It is an amenable number.

74656240 is an abundant number, since it is smaller than the sum of its proper divisors (101872640).

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

74656240 is a wasteful number, since it uses less digits than its factorization.

74656240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15889 (or 15883 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 74656240 is about 8640.3842507148. The cubic root of 74656240 is about 421.0710381646.

The spelling of 74656240 in words is "seventy-four million, six hundred fifty-six thousand, two hundred forty".