55277808 has 80 divisors (see below), whose sum is σ = 147312000. Its totient is φ = 17854720.

The previous prime is 55277791. The next prime is 55277839. The reversal of 55277808 is 80877255.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55277808.

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, 370918 + ... + 371066.

It is an arithmetic number, because the mean of its divisors is an integer number (1841400).

Almost surely, 2^55277808 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 55277808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73656000).

55277808 is an abundant number, since it is smaller than the sum of its proper divisors (92034192).

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

55277808 is a wasteful number, since it uses less digits than its factorization.

55277808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 55277808 is about 7434.9047068540. The cubic root of 55277808 is about 380.9344683760.

The spelling of 55277808 in words is "fifty-five million, two hundred seventy-seven thousand, eight hundred eight".