55307028 has 24 divisors (see below), whose sum is σ = 147485632. Its totient is φ = 15801984.

The previous prime is 55307027. The next prime is 55307039. The reversal of 55307028 is 82070355.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55306986 and 55307004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55307023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329125 + ... + 329292.

Almost surely, 2^55307028 is an apocalyptic number.

It is an amenable number.

55307028 is an abundant number, since it is smaller than the sum of its proper divisors (92178604).

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

55307028 is a wasteful number, since it uses less digits than its factorization.

55307028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658431 (or 658429 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55307028 is about 7436.8695026873. The cubic root of 55307028 is about 381.0015775522.

The spelling of 55307028 in words is "fifty-five million, three hundred seven thousand, twenty-eight".