28625697 has 16 divisors (see below), whose sum is σ = 43872000. Its totient is φ = 18425232.

The previous prime is 28625669. The next prime is 28625711. The reversal of 28625697 is 79652682.

28625697 is a `hidden beast` number, since 2 + 86 + 2 + 569 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28625697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28625627) 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, 17497 + ... + 19062.

It is an arithmetic number, because the mean of its divisors is an integer number (2742000).

Almost surely, 2^28625697 is an apocalyptic number.

28625697 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28625697 is a deficient number, since it is larger than the sum of its proper divisors (15246303).

28625697 is a wasteful number, since it uses less digits than its factorization.

28625697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36597 (or 36591 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28625697 is about 5350.2987767040. The cubic root of 28625697 is about 305.9041414467.

The spelling of 28625697 in words is "twenty-eight million, six hundred twenty-five thousand, six hundred ninety-seven".