55278608 has 60 divisors (see below), whose sum is σ = 134574720. Its totient is φ = 21531840.

The previous prime is 55278589. The next prime is 55278631. The reversal of 55278608 is 80687255.

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, 11513 + ... + 15591.

It is an arithmetic number, because the mean of its divisors is an integer number (2242912).

Almost surely, 2^55278608 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 55278608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67287360).

55278608 is an abundant number, since it is smaller than the sum of its proper divisors (79296112).

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

55278608 is a wasteful number, since it uses less digits than its factorization.

55278608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 4099 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 55278608 is about 7434.9585069454. The cubic root of 55278608 is about 380.9363060400.

The spelling of 55278608 in words is "fifty-five million, two hundred seventy-eight thousand, six hundred eight".