28896131 has 12 divisors (see below), whose sum is σ = 33436200. Its totient is φ = 24884640.

The previous prime is 28896121. The next prime is 28896137. The reversal of 28896131 is 13169882.

It is a de Polignac number, because none of the positive numbers 2^k-28896131 is a prime.

It is a super-2 number, since 2×28896131² = 1669972773538322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28896137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3986 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (2786350).

Almost surely, 2^28896131 is an apocalyptic number.

28896131 is a deficient number, since it is larger than the sum of its proper divisors (4540069).

28896131 is a wasteful number, since it uses less digits than its factorization.

28896131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12610 (or 12599 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 28896131 is about 5375.5121616456. The cubic root of 28896131 is about 306.8644409241.

It can be divided in two parts, 28896 and 131, that multiplied together give a triangular number (3785376 = T₂₇₅₁).

The spelling of 28896131 in words is "twenty-eight million, eight hundred ninety-six thousand, one hundred thirty-one".