28072925 has 12 divisors (see below), whose sum is σ = 34896576. Its totient is φ = 22402800.

The previous prime is 28072921. The next prime is 28072927. The reversal of 28072925 is 52927082.

It is not a de Polignac number, because 28072925 - 2² = 28072921 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072921) 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, 11132 + ... + 13418.

It is an arithmetic number, because the mean of its divisors is an integer number (2908048).

Almost surely, 2^28072925 is an apocalyptic number.

28072925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28072925 is a deficient number, since it is larger than the sum of its proper divisors (6823651).

28072925 is a wasteful number, since it uses less digits than its factorization.

28072925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788 (or 2783 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28072925 is about 5298.3889060732. The cubic root of 28072925 is about 303.9222915702.

The spelling of 28072925 in words is "twenty-eight million, seventy-two thousand, nine hundred twenty-five".