73405656 has 32 divisors (see below), whose sum is σ = 203905200. Its totient is φ = 24468480.

The previous prime is 73405649. The next prime is 73405679. The reversal of 73405656 is 65650437.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 73405656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169705 + ... + 170136.

Almost surely, 2^73405656 is an apocalyptic number.

It is an amenable number.

73405656 is an abundant number, since it is smaller than the sum of its proper divisors (130499544).

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

73405656 is a wasteful number, since it uses less digits than its factorization.

73405656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339856 (or 339846 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 73405656 is about 8567.7100791285. The cubic root of 73405656 is about 418.7066334833.

It can be divided in two parts, 7340 and 5656, that added together give a square (12996 = 114²).

The spelling of 73405656 in words is "seventy-three million, four hundred five thousand, six hundred fifty-six".