28238955 has 64 divisors (see below), whose sum is σ = 51020928. Its totient is φ = 13271040.

The previous prime is 28238933. The next prime is 28238971. The reversal of 28238955 is 55983282.

It is not a de Polignac number, because 28238955 - 2¹² = 28234859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 386799 + ... + 386871.

It is an arithmetic number, because the mean of its divisors is an integer number (797202).

Almost surely, 2^28238955 is an apocalyptic number.

28238955 is a deficient number, since it is larger than the sum of its proper divisors (22781973).

28238955 is a wasteful number, since it uses less digits than its factorization.

28238955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its digits is 172800, while the sum is 42.

The square root of 28238955 is about 5314.0337785904. The cubic root of 28238955 is about 304.5202706515.

The spelling of 28238955 in words is "twenty-eight million, two hundred thirty-eight thousand, nine hundred fifty-five".