28525506 has 16 divisors (see below), whose sum is σ = 57271104. Its totient is φ = 9471824.

The previous prime is 28525499. The next prime is 28525513. The reversal of 28525506 is 60552582.

It is an interprime number because it is at equal distance from previous prime (28525499) and next prime (28525513).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7461 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (3579444).

Almost surely, 2^28525506 is an apocalyptic number.

28525506 is an abundant number, since it is smaller than the sum of its proper divisors (28745598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28525506 is a wasteful number, since it uses less digits than its factorization.

28525506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18345.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 28525506 is about 5340.9274475507. The cubic root of 28525506 is about 305.5468323142.

The spelling of 28525506 in words is "twenty-eight million, five hundred twenty-five thousand, five hundred six".