55578600 has 288 divisors, whose sum is σ = 233288640. Its totient is φ = 11520000.

The previous prime is 55578547. The next prime is 55578613. The reversal of 55578600 is 687555.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 138400 + ... + 138800.

It is an arithmetic number, because the mean of its divisors is an integer number (810030).

Almost surely, 2^55578600 is an apocalyptic number.

55578600 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 55578600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116644320).

55578600 is an abundant number, since it is smaller than the sum of its proper divisors (177710040).

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

55578600 is a wasteful number, since it uses less digits than its factorization.

55578600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 55578600 is about 7455.1056330544. The cubic root of 55578600 is about 381.6241654989.

The spelling of 55578600 in words is "fifty-five million, five hundred seventy-eight thousand, six hundred".