28396625 has 16 divisors (see below), whose sum is σ = 35592960. Its totient is φ = 22618800.

The previous prime is 28396619. The next prime is 28396633. The reversal of 28396625 is 52669382.

It is not a de Polignac number, because 28396625 - 2⁸ = 28396369 is a prime.

It is a super-2 number, since 2×28396625² = 1612736622781250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45566 + ... + 46184.

It is an arithmetic number, because the mean of its divisors is an integer number (2224560).

Almost surely, 2^28396625 is an apocalyptic number.

28396625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28396625 is a deficient number, since it is larger than the sum of its proper divisors (7196335).

28396625 is an equidigital number, since it uses as much as digits as its factorization.

28396625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 991 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 28396625 is about 5328.8483746491. The cubic root of 28396625 is about 305.0859741506.

The spelling of 28396625 in words is "twenty-eight million, three hundred ninety-six thousand, six hundred twenty-five".