28630925 has 12 divisors (see below), whose sum is σ = 35581056. Its totient is φ = 22854000.

The previous prime is 28630867. The next prime is 28630939. The reversal of 28630925 is 52903682.

It is not a de Polignac number, because 28630925 - 2²⁰ = 27582349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13700 + ... + 15650.

It is an arithmetic number, because the mean of its divisors is an integer number (2965088).

Almost surely, 2^28630925 is an apocalyptic number.

28630925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28630925 is a deficient number, since it is larger than the sum of its proper divisors (6950131).

28630925 is a wasteful number, since it uses less digits than its factorization.

28630925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 28630925 is about 5350.7873252448. The cubic root of 28630925 is about 305.9227630544.

The spelling of 28630925 in words is "twenty-eight million, six hundred thirty thousand, nine hundred twenty-five".