28837525 has 12 divisors (see below), whose sum is σ = 37862532. Its totient is φ = 21712640.

The previous prime is 28837519. The next prime is 28837547. The reversal of 28837525 is 52573882.

It can be written as a sum of positive squares in 6 ways, for example, as 715716 + 28121809 = 846^2 + 5303^2 .

It is not a de Polignac number, because 28837525 - 2²³ = 20448917 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 33502 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (3155211).

Almost surely, 2^28837525 is an apocalyptic number.

28837525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28837525 is a deficient number, since it is larger than the sum of its proper divisors (9025007).

28837525 is a wasteful number, since it uses less digits than its factorization.

28837525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67880 (or 67875 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 28837525 is about 5370.0581933532. The cubic root of 28837525 is about 306.6568437045.

The spelling of 28837525 in words is "twenty-eight million, eight hundred thirty-seven thousand, five hundred twenty-five".