28125015 has 16 divisors (see below), whose sum is σ = 45069696. Its totient is φ = 14976800.

The previous prime is 28125007. The next prime is 28125023. The reversal of 28125015 is 51052182.

It is an interprime number because it is at equal distance from previous prime (28125007) and next prime (28125023).

It is not a de Polignac number, because 28125015 - 2³ = 28125007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13600 + ... + 15530.

It is an arithmetic number, because the mean of its divisors is an integer number (2816856).

Almost surely, 2^28125015 is an apocalyptic number.

28125015 is a deficient number, since it is larger than the sum of its proper divisors (16944681).

28125015 is a wasteful number, since it uses less digits than its factorization.

28125015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 28125015 is about 5303.3022731125. The cubic root of 28125015 is about 304.1101538427.

Adding to 28125015 its reverse (51052182), we get a palindrome (79177197).

The spelling of 28125015 in words is "twenty-eight million, one hundred twenty-five thousand, fifteen".