28986925 has 12 divisors (see below), whose sum is σ = 39211776. Its totient is φ = 21081200.

The previous prime is 28986911. The next prime is 28986929. The reversal of 28986925 is 52968982.

It is not a de Polignac number, because 28986925 - 2²¹ = 26889773 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 (28986929) 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, 52429 + ... + 52978.

It is an arithmetic number, because the mean of its divisors is an integer number (3267648).

Almost surely, 2^28986925 is an apocalyptic number.

28986925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28986925 is a deficient number, since it is larger than the sum of its proper divisors (10224851).

28986925 is a wasteful number, since it uses less digits than its factorization.

28986925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105428 (or 105423 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 28986925 is about 5383.9506869956. The cubic root of 28986925 is about 307.1855025903.

The spelling of 28986925 in words is "twenty-eight million, nine hundred eighty-six thousand, nine hundred twenty-five".