28886031 has 8 divisors (see below), whose sum is σ = 42794160. Its totient is φ = 19257336.

The previous prime is 28886003. The next prime is 28886057. The reversal of 28886031 is 13068882.

It is not a de Polignac number, because 28886031 - 2¹⁴ = 28869647 is a prime.

It is a super-2 number, since 2×28886031² = 1668805573865922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28886071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534900 + ... + 534953.

It is an arithmetic number, because the mean of its divisors is an integer number (5349270).

Almost surely, 2^28886031 is an apocalyptic number.

28886031 is a deficient number, since it is larger than the sum of its proper divisors (13908129).

28886031 is a wasteful number, since it uses less digits than its factorization.

28886031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069862 (or 1069856 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28886031 is about 5374.5726341729. The cubic root of 28886031 is about 306.8286842106.

The spelling of 28886031 in words is "twenty-eight million, eight hundred eighty-six thousand, thirty-one".