72055560 has 32 divisors (see below), whose sum is σ = 216167040. Its totient is φ = 19214784.

The previous prime is 72055549. The next prime is 72055583. The reversal of 72055560 is 6555027.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 300112 + ... + 300351.

It is an arithmetic number, because the mean of its divisors is an integer number (6755220).

Almost surely, 2^72055560 is an apocalyptic number.

It is an amenable number.

72055560 is an abundant number, since it is smaller than the sum of its proper divisors (144111480).

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

72055560 is a wasteful number, since it uses less digits than its factorization.

72055560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600477 (or 600473 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 72055560 is about 8488.5546472883. The cubic root of 72055560 is about 416.1237458538.

It can be divided in two parts, 720 and 55560, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 72055560 in words is "seventy-two million, fifty-five thousand, five hundred sixty".