28900131 has 16 divisors (see below), whose sum is σ = 41696256. Its totient is φ = 17699616.

The previous prime is 28900129. The next prime is 28900133. The reversal of 28900131 is 13100982.

It is an interprime number because it is at equal distance from previous prime (28900129) and next prime (28900133).

It is not a de Polignac number, because 28900131 - 2¹ = 28900129 is a prime.

It is a super-2 number, since 2×28900131² = 1670435143634322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28900133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7036 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (2606016).

Almost surely, 2^28900131 is an apocalyptic number.

28900131 is a deficient number, since it is larger than the sum of its proper divisors (12796125).

28900131 is a wasteful number, since it uses less digits than its factorization.

28900131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 28900131 is about 5375.8842063422. The cubic root of 28900131 is about 306.8785996953.

The spelling of 28900131 in words is "twenty-eight million, nine hundred thousand, one hundred thirty-one".