28170330 has 16 divisors (see below), whose sum is σ = 67608864. Its totient is φ = 7512080.

The previous prime is 28170323. The next prime is 28170341. The reversal of 28170330 is 3307182.

It is a self number, because there is not a number n which added to its sum of digits gives 28170330.

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, 469476 + ... + 469535.

It is an arithmetic number, because the mean of its divisors is an integer number (4225554).

Almost surely, 2^28170330 is an apocalyptic number.

28170330 is an abundant number, since it is smaller than the sum of its proper divisors (39438534).

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

28170330 is a wasteful number, since it uses less digits than its factorization.

28170330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939021.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 28170330 is about 5307.5728916332. The cubic root of 28170330 is about 304.2733935430.

The spelling of 28170330 in words is "twenty-eight million, one hundred seventy thousand, three hundred thirty".