55388964 has 24 divisors (see below), whose sum is σ = 131433120. Its totient is φ = 18149824.

The previous prime is 55388953. The next prime is 55388987. The reversal of 55388964 is 46988355.

It is a happy 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, 38409 + ... + 39824.

It is an arithmetic number, because the mean of its divisors is an integer number (5476380).

Almost surely, 2^55388964 is an apocalyptic number.

It is an amenable number.

55388964 is an abundant number, since it is smaller than the sum of its proper divisors (76044156).

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

55388964 is a wasteful number, since it uses less digits than its factorization.

55388964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78299 (or 78297 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 48.

The square root of 55388964 is about 7442.3762334351. The cubic root of 55388964 is about 381.1896328678.

The spelling of 55388964 in words is "fifty-five million, three hundred eighty-eight thousand, nine hundred sixty-four".