55980628 has 12 divisors (see below), whose sum is σ = 106872192. Its totient is φ = 25445720.

The previous prime is 55980607. The next prime is 55980629. The reversal of 55980628 is 82608955.

It is a super-2 number, since 2×55980628² = 6267661422548768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55980629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636100 + ... + 636187.

It is an arithmetic number, because the mean of its divisors is an integer number (8906016).

Almost surely, 2^55980628 is an apocalyptic number.

It is an amenable number.

55980628 is a deficient number, since it is larger than the sum of its proper divisors (50891564).

55980628 is a wasteful number, since it uses less digits than its factorization.

55980628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272302 (or 1272300 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 55980628 is about 7482.0203153961. The cubic root of 55980628 is about 382.5421156298.

The spelling of 55980628 in words is "fifty-five million, nine hundred eighty thousand, six hundred twenty-eight".