55803900 has 36 divisors (see below), whose sum is σ = 161460152. Its totient is φ = 14880960.

The previous prime is 55803887. The next prime is 55803907. The reversal of 55803900 is 930855.

It is a super-2 number, since 2×55803900² = 6228150510420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55803907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92707 + ... + 93306.

Almost surely, 2^55803900 is an apocalyptic number.

55803900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55803900 is an abundant number, since it is smaller than the sum of its proper divisors (105656252).

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

55803900 is a wasteful number, since it uses less digits than its factorization.

55803900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186030 (or 186023 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 55803900 is about 7470.2008005140. The cubic root of 55803900 is about 382.1391359249.

The spelling of 55803900 in words is "fifty-five million, eight hundred three thousand, nine hundred".