28744925 has 12 divisors (see below), whose sum is σ = 38884416. Its totient is φ = 20905200.

The previous prime is 28744889. The next prime is 28744939. The reversal of 28744925 is 52944782.

It is not a de Polignac number, because 28744925 - 2⁸ = 28744669 is a prime.

It is a Duffinian number.

It is a Curzon 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, 51989 + ... + 52538.

It is an arithmetic number, because the mean of its divisors is an integer number (3240368).

Almost surely, 2^28744925 is an apocalyptic number.

28744925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28744925 is a deficient number, since it is larger than the sum of its proper divisors (10139491).

28744925 is a wasteful number, since it uses less digits than its factorization.

28744925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104548 (or 104543 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 28744925 is about 5361.4293803052. The cubic root of 28744925 is about 306.3282571078.

The spelling of 28744925 in words is "twenty-eight million, seven hundred forty-four thousand, nine hundred twenty-five".