55597800 has 96 divisors (see below), whose sum is σ = 181461600. Its totient is φ = 14042880.

The previous prime is 55597793. The next prime is 55597811. The reversal of 55597800 is 879555.

It is a super-2 number, since 2×55597800² = 6182230729680000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8962 + ... + 13838.

It is an arithmetic number, because the mean of its divisors is an integer number (1890225).

Almost surely, 2^55597800 is an apocalyptic number.

55597800 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 55597800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90730800).

55597800 is an abundant number, since it is smaller than the sum of its proper divisors (125863800).

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

55597800 is a wasteful number, since it uses less digits than its factorization.

55597800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915 (or 4906 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The square root of 55597800 is about 7456.3932299739. The cubic root of 55597800 is about 381.6681053151.

The spelling of 55597800 in words is "fifty-five million, five hundred ninety-seven thousand, eight hundred".