55418904 has 40 divisors (see below), whose sum is σ = 155226060. Its totient is φ = 18472752.

The previous prime is 55418903. The next prime is 55418977. The reversal of 55418904 is 40981455.

55418904 is a `hidden beast` number, since 554 + 18 + 90 + 4 = 666.

It is a super-2 number, since 2×55418904² = 6142509841122432, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55418903) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42114 + ... + 43409.

Almost surely, 2^55418904 is an apocalyptic number.

55418904 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55418904 is an abundant number, since it is smaller than the sum of its proper divisors (99807156).

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

55418904 is a wasteful number, since it uses less digits than its factorization.

55418904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85541 (or 85528 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 55418904 is about 7444.3874160336. The cubic root of 55418904 is about 381.2583033576.

The spelling of 55418904 in words is "fifty-five million, four hundred eighteen thousand, nine hundred four".