55770408 has 24 divisors (see below), whose sum is σ = 151045050. Its totient is φ = 18590112.

The previous prime is 55770391. The next prime is 55770413. The reversal of 55770408 is 80407755.

It can be written as a sum of positive squares in only one way, i.e., 36216324 + 19554084 = 6018^2 + 4422^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×55770408² = 6220676816972928, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387223 + ... + 387366.

Almost surely, 2^55770408 is an apocalyptic number.

It is an amenable number.

55770408 is an abundant number, since it is smaller than the sum of its proper divisors (95274642).

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

55770408 is a wasteful number, since it uses less digits than its factorization.

55770408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774601 (or 774594 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 55770408 is about 7467.9587572509. The cubic root of 55770408 is about 382.0626707480.

The spelling of 55770408 in words is "fifty-five million, seven hundred seventy thousand, four hundred eight".