28290125 has 16 divisors (see below), whose sum is σ = 37385712. Its totient is φ = 21299200.

The previous prime is 28290103. The next prime is 28290127. The reversal of 28290125 is 52109282.

It can be written as a sum of positive squares in 8 ways, for example, as 7295401 + 20994724 = 2701^2 + 4582^2 .

It is not a de Polignac number, because 28290125 - 2⁶ = 28290061 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 (28290127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4532 + ... + 8781.

It is an arithmetic number, because the mean of its divisors is an integer number (2336607).

Almost surely, 2^28290125 is an apocalyptic number.

28290125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28290125 is a deficient number, since it is larger than the sum of its proper divisors (9095587).

28290125 is a wasteful number, since it uses less digits than its factorization.

28290125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13345 (or 13335 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28290125 is about 5318.8462094706. The cubic root of 28290125 is about 304.7040935517.

The spelling of 28290125 in words is "twenty-eight million, two hundred ninety thousand, one hundred twenty-five".