55791288 has 64 divisors (see below), whose sum is σ = 177120000. Its totient is φ = 15939936.

The previous prime is 55791287. The next prime is 55791293. The reversal of 55791288 is 88219755.

It is a happy number.

55791288 is a `hidden beast` number, since 557 + 9 + 12 + 88 = 666.

It is a super-2 number, since 2×55791288² = 6225335633397888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55791287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16938 + ... + 19961.

It is an arithmetic number, because the mean of its divisors is an integer number (2767500).

Almost surely, 2^55791288 is an apocalyptic number.

It is an amenable number.

55791288 is an abundant number, since it is smaller than the sum of its proper divisors (121328712).

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

55791288 is a wasteful number, since it uses less digits than its factorization.

55791288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36921 (or 36911 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 55791288 is about 7469.3565987975. The cubic root of 55791288 is about 382.1103452137.

The spelling of 55791288 in words is "fifty-five million, seven hundred ninety-one thousand, two hundred eighty-eight".