28861188 has 24 divisors (see below), whose sum is σ = 68349792. Its totient is φ = 9476544.

The previous prime is 28861163. The next prime is 28861199. The reversal of 28861188 is 88116882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17145 + ... + 18752.

It is an arithmetic number, because the mean of its divisors is an integer number (2847908).

Almost surely, 2^28861188 is an apocalyptic number.

It is an amenable number.

28861188 is an abundant number, since it is smaller than the sum of its proper divisors (39488604).

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

28861188 is a wasteful number, since it uses less digits than its factorization.

28861188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35971 (or 35969 counting only the distinct ones).

The product of its digits is 49152, while the sum is 42.

The square root of 28861188 is about 5372.2609765349. The cubic root of 28861188 is about 306.7406978380.

The spelling of 28861188 in words is "twenty-eight million, eight hundred sixty-one thousand, one hundred eighty-eight".