28138862 has 12 divisors (see below), whose sum is σ = 42826488. Its totient is φ = 13866300.

The previous prime is 28138849. The next prime is 28138883. The reversal of 28138862 is 26883182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8687 + ... + 11477.

It is an arithmetic number, because the mean of its divisors is an integer number (3568874).

Almost surely, 2^28138862 is an apocalyptic number.

28138862 is a deficient number, since it is larger than the sum of its proper divisors (14687626).

28138862 is an equidigital number, since it uses as much as digits as its factorization.

28138862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935 (or 2864 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 28138862 is about 5304.6076197962. The cubic root of 28138862 is about 304.1600539335.

The spelling of 28138862 in words is "twenty-eight million, one hundred thirty-eight thousand, eight hundred sixty-two".