55440100 has 36 divisors (see below), whose sum is σ = 126641200. Its totient is φ = 21008160.

The previous prime is 55440079. The next prime is 55440139. The reversal of 55440100 is 104455.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12690 + ... + 16489.

Almost surely, 2^55440100 is an apocalyptic number.

55440100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55440100 is an abundant number, since it is smaller than the sum of its proper divisors (71201100).

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

55440100 is a wasteful number, since it uses less digits than its factorization.

55440100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29212 (or 29205 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 55440100 is about 7445.8109027829. The cubic root of 55440100 is about 381.3069036268.

Adding to 55440100 its reverse (104455), we get a palindrome (55544555).

The spelling of 55440100 in words is "fifty-five million, four hundred forty thousand, one hundred".