28115874 has 24 divisors (see below), whose sum is σ = 61311900. Its totient is φ = 9311328.

The previous prime is 28115837. The next prime is 28115891. The reversal of 28115874 is 47851182.

It can be written as a sum of positive squares in 2 ways, for example, as 27405225 + 710649 = 5235^2 + 843^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2149 + ... + 7800.

Almost surely, 2^28115874 is an apocalyptic number.

28115874 is an abundant number, since it is smaller than the sum of its proper divisors (33196026).

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

28115874 is a wasteful number, since it uses less digits than its factorization.

28115874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10114 (or 10111 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 28115874 is about 5302.4403815602. The cubic root of 28115874 is about 304.0772036720.

The spelling of 28115874 in words is "twenty-eight million, one hundred fifteen thousand, eight hundred seventy-four".