55028100 has 144 divisors (see below), whose sum is σ = 168766976. Its totient is φ = 13824000.

The previous prime is 55028021. The next prime is 55028101. The reversal of 55028100 is 182055.

It is a super-2 number, since 2×55028100² = 6056183579220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55028101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 567252 + ... + 567348.

Almost surely, 2^55028100 is an apocalyptic number.

55028100 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 55028100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84383488).

55028100 is an abundant number, since it is smaller than the sum of its proper divisors (113738876).

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

55028100 is a wasteful number, since it uses less digits than its factorization.

55028100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 55028100 is about 7418.0927467915. The cubic root of 55028100 is about 380.3600004823.

The spelling of 55028100 in words is "fifty-five million, twenty-eight thousand, one hundred".