28625131 has 2 divisors, whose sum is σ = 28625132. Its totient is φ = 28625130.

The previous prime is 28625119. The next prime is 28625171. The reversal of 28625131 is 13152682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28625131 - 2⁹ = 28624619 is a prime.

It is a super-2 number, since 2×28625131² = 1638796249534322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28625131.

It is not a weakly prime, because it can be changed into another prime (28625111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14312565 + 14312566.

It is an arithmetic number, because the mean of its divisors is an integer number (14312566).

Almost surely, 2^28625131 is an apocalyptic number.

28625131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28625131 is an equidigital number, since it uses as much as digits as its factorization.

28625131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 28625131 is about 5350.2458822002. The cubic root of 28625131 is about 305.9021252759.

The spelling of 28625131 in words is "twenty-eight million, six hundred twenty-five thousand, one hundred thirty-one".