28876131 has 6 divisors (see below), whose sum is σ = 41709980. Its totient is φ = 19250748.

The previous prime is 28876121. The next prime is 28876151. The reversal of 28876131 is 13167882.

It is not a de Polignac number, because 28876131 - 2¹⁰ = 28875107 is a prime.

It is a super-2 number, since 2×28876131² = 1667661883058322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28876121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1604221 + ... + 1604238.

Almost surely, 2^28876131 is an apocalyptic number.

28876131 is a deficient number, since it is larger than the sum of its proper divisors (12833849).

28876131 is a wasteful number, since it uses less digits than its factorization.

28876131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208465 (or 3208462 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 28876131 is about 5373.6515517849. The cubic root of 28876131 is about 306.7936274611.

The spelling of 28876131 in words is "twenty-eight million, eight hundred seventy-six thousand, one hundred thirty-one".