55309008 has 80 divisors (see below), whose sum is σ = 148054016. Its totient is φ = 17781120.

The previous prime is 55308971. The next prime is 55309013. The reversal of 55309008 is 80090355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262023 + ... + 262233.

Almost surely, 2^55309008 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 55309008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74027008).

55309008 is an abundant number, since it is smaller than the sum of its proper divisors (92745008).

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

55309008 is a wasteful number, since it uses less digits than its factorization.

55309008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 386 counting only the distinct ones).

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

The square root of 55309008 is about 7437.0026220245. The cubic root of 55309008 is about 381.0061241360.

The spelling of 55309008 in words is "fifty-five million, three hundred nine thousand, eight".