55979700 has 288 divisors, whose sum is σ = 206653440. Its totient is φ = 11404800.

The previous prime is 55979687. The next prime is 55979711. The reversal of 55979700 is 797955.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 917670 + ... + 917730.

Almost surely, 2^55979700 is an apocalyptic number.

55979700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55979700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103326720).

55979700 is an abundant number, since it is smaller than the sum of its proper divisors (150673740).

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

55979700 is a wasteful number, since it uses less digits than its factorization.

55979700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 99225, while the sum is 42.

The square root of 55979700 is about 7481.9582998036. The cubic root of 55979700 is about 382.5400017971.

The spelling of 55979700 in words is "fifty-five million, nine hundred seventy-nine thousand, seven hundred".