73720856 has 16 divisors (see below), whose sum is σ = 150792840. Its totient is φ = 33509440.

The previous prime is 73720841. The next prime is 73720903. The reversal of 73720856 is 65802737.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418781 + ... + 418956.

Almost surely, 2^73720856 is an apocalyptic number.

It is an amenable number.

73720856 is an abundant number, since it is smaller than the sum of its proper divisors (77071984).

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

73720856 is a wasteful number, since it uses less digits than its factorization.

73720856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837754 (or 837750 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 73720856 is about 8586.0850217081. The cubic root of 73720856 is about 419.3050791055.

The spelling of 73720856 in words is "seventy-three million, seven hundred twenty thousand, eight hundred fifty-six".