28108628955 has 24 divisors (see below), whose sum is σ = 53150862960. Its totient is φ = 13628425920.

The previous prime is 28108628941. The next prime is 28108628981. The reversal of 28108628955 is 55982680182.

It is a happy number.

28108628955 is a `hidden beast` number, since 2 + 8 + 1 + 0 + 8 + 628 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 28108628955 - 2⁴ = 28108628939 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28392060 + ... + 28393049.

It is an arithmetic number, because the mean of its divisors is an integer number (2214619290).

Almost surely, 2^28108628955 is an apocalyptic number.

28108628955 is a deficient number, since it is larger than the sum of its proper divisors (25042234005).

28108628955 is a wasteful number, since it uses less digits than its factorization.

28108628955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56785131 (or 56785128 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 28108628955 in words is "twenty-eight billion, one hundred eight million, six hundred twenty-eight thousand, nine hundred fifty-five".