55198908 has 72 divisors (see below), whose sum is σ = 146306160. Its totient is φ = 18195840.

The previous prime is 55198889. The next prime is 55198921. The reversal of 55198908 is 80989155.

55198908 is a `hidden beast` number, since 551 + 9 + 8 + 90 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105688 + ... + 106208.

It is an arithmetic number, because the mean of its divisors is an integer number (2032030).

Almost surely, 2^55198908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55198908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73153080).

55198908 is an abundant number, since it is smaller than the sum of its proper divisors (91107252).

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

55198908 is a wasteful number, since it uses less digits than its factorization.

55198908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 55198908 is about 7429.5967589096. The cubic root of 55198908 is about 380.7531415961.

The spelling of 55198908 in words is "fifty-five million, one hundred ninety-eight thousand, nine hundred eight".