28000625 has 20 divisors (see below), whose sum is σ = 35538624. Its totient is φ = 22050000.

The previous prime is 28000613. The next prime is 28000691. The reversal of 28000625 is 52600082.

It is a happy number.

It is not a de Polignac number, because 28000625 - 2⁶ = 28000561 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28000625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44060 + ... + 44690.

Almost surely, 2^28000625 is an apocalyptic number.

28000625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28000625 is a deficient number, since it is larger than the sum of its proper divisors (7537999).

28000625 is an frugal number, since it uses more digits than its factorization.

28000625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28000625 is about 5291.5616787485. The cubic root of 28000625 is about 303.6611565376.

The spelling of 28000625 in words is "twenty-eight million, six hundred twenty-five", and thus it is an aban number.