28750925 has 12 divisors (see below), whose sum is σ = 40744416. Its totient is φ = 19714800.

The previous prime is 28750913. The next prime is 28750979. The reversal of 28750925 is 52905782.

It is not a de Polignac number, because 28750925 - 2¹⁸ = 28488781 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, 81971 + ... + 82320.

It is an arithmetic number, because the mean of its divisors is an integer number (3395368).

Almost surely, 2^28750925 is an apocalyptic number.

28750925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28750925 is a deficient number, since it is larger than the sum of its proper divisors (11993491).

28750925 is a wasteful number, since it uses less digits than its factorization.

28750925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164308 (or 164303 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 28750925 is about 5361.9889033828. The cubic root of 28750925 is about 306.3495691791.

The spelling of 28750925 in words is "twenty-eight million, seven hundred fifty thousand, nine hundred twenty-five".