28625999 has 2 divisors, whose sum is σ = 28626000. Its totient is φ = 28625998.

The previous prime is 28625983. The next prime is 28626043. The reversal of 28625999 is 99952682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28625999 - 2⁴ = 28625983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28625939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14312999 + 14313000.

It is an arithmetic number, because the mean of its divisors is an integer number (14313000).

Almost surely, 2^28625999 is an apocalyptic number.

28625999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28625999 is an equidigital number, since it uses as much as digits as its factorization.

28625999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 50.

The square root of 28625999 is about 5350.3269993525. The cubic root of 28625999 is about 305.9052172019.

The spelling of 28625999 in words is "twenty-eight million, six hundred twenty-five thousand, nine hundred ninety-nine".