55409872 has 20 divisors (see below), whose sum is σ = 122693536. Its totient is φ = 23747040.

The previous prime is 55409869. The next prime is 55409873. The reversal of 55409872 is 27890455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55409873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247254 + ... + 247477.

Almost surely, 2^55409872 is an apocalyptic number.

It is an amenable number.

55409872 is an abundant number, since it is smaller than the sum of its proper divisors (67283664).

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

55409872 is a wasteful number, since it uses less digits than its factorization.

55409872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494746 (or 494740 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 55409872 is about 7443.7807598021. The cubic root of 55409872 is about 381.2375901362.

The spelling of 55409872 in words is "fifty-five million, four hundred nine thousand, eight hundred seventy-two".