55872240 has 40 divisors (see below), whose sum is σ = 173204688. Its totient is φ = 14899200.

The previous prime is 55872239. The next prime is 55872269. The reversal of 55872240 is 4227855.

It is a tau number, because it is divible by the number of its divisors (40).

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, 116161 + ... + 116640.

Almost surely, 2^55872240 is an apocalyptic number.

It is an amenable number.

55872240 is an abundant number, since it is smaller than the sum of its proper divisors (117332448).

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

55872240 is a wasteful number, since it uses less digits than its factorization.

55872240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232817 (or 232811 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 55872240 is about 7474.7735751660. The cubic root of 55872240 is about 382.2950672911.

The spelling of 55872240 in words is "fifty-five million, eight hundred seventy-two thousand, two hundred forty".