28525170 has 16 divisors (see below), whose sum is σ = 68460480. Its totient is φ = 7606704.

The previous prime is 28525157. The next prime is 28525219. The reversal of 28525170 is 7152582.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 950839 = 28525170 / (2 + 8 + 5 + 2 + 5 + 1 + 7 + 0).

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, 475390 + ... + 475449.

It is an arithmetic number, because the mean of its divisors is an integer number (4278780).

Almost surely, 2^28525170 is an apocalyptic number.

28525170 is an abundant number, since it is smaller than the sum of its proper divisors (39935310).

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

28525170 is a wasteful number, since it uses less digits than its factorization.

28525170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950849.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 28525170 is about 5340.8959922470. The cubic root of 28525170 is about 305.5456326377.

The spelling of 28525170 in words is "twenty-eight million, five hundred twenty-five thousand, one hundred seventy".