74243656 has 8 divisors (see below), whose sum is σ = 139206870. Its totient is φ = 37121824.

The previous prime is 74243633. The next prime is 74243657. The reversal of 74243656 is 65634247.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 111556 = 8610^2 + 334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (74243657) by changing a digit.

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 as a sum of consecutive naturals, namely, 4640221 + ... + 4640236.

Almost surely, 2^74243656 is an apocalyptic number.

It is an amenable number.

74243656 is a deficient number, since it is larger than the sum of its proper divisors (64963214).

74243656 is a wasteful number, since it uses less digits than its factorization.

74243656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280463 (or 9280459 counting only the distinct ones).

The product of its digits is 120960, while the sum is 37.

The square root of 74243656 is about 8616.4758457272. The cubic root of 74243656 is about 420.2939287944.

The spelling of 74243656 in words is "seventy-four million, two hundred forty-three thousand, six hundred fifty-six".