55028290 has 16 divisors (see below), whose sum is σ = 99144000. Its totient is φ = 21990640.

The previous prime is 55028251. The next prime is 55028299. The reversal of 55028290 is 9282055.

It is a happy number.

It is a super-2 number, since 2×55028290² = 6056225400648200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55028299) 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, 13155 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (6196500).

Almost surely, 2^55028290 is an apocalyptic number.

55028290 is a deficient number, since it is larger than the sum of its proper divisors (44115710).

55028290 is a wasteful number, since it uses less digits than its factorization.

55028290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 55028290 is about 7418.1055533067. The cubic root of 55028290 is about 380.3604382485.

The spelling of 55028290 in words is "fifty-five million, twenty-eight thousand, two hundred ninety".