55770072 has 32 divisors (see below), whose sum is σ = 139945200. Its totient is φ = 18520704.

The previous prime is 55770061. The next prime is 55770089. The reversal of 55770072 is 27007755.

It is a super-2 number, since 2×55770072² = 6220601861770368, which contains 22 as substring.

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, 2454 + ... + 10842.

Almost surely, 2^55770072 is an apocalyptic number.

It is an amenable number.

55770072 is an abundant number, since it is smaller than the sum of its proper divisors (84175128).

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

55770072 is a wasteful number, since it uses less digits than its factorization.

55770072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675 (or 8671 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 33.

The square root of 55770072 is about 7467.9362611099. The cubic root of 55770072 is about 382.0619034754.

The spelling of 55770072 in words is "fifty-five million, seven hundred seventy thousand, seventy-two".