28160428 has 12 divisors (see below), whose sum is σ = 49441392. Its totient is φ = 14034320.

The previous prime is 28160417. The next prime is 28160453. The reversal of 28160428 is 82406182.

It is a self number, because there is not a number n which added to its sum of digits gives 28160428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10075 + ... + 12562.

It is an arithmetic number, because the mean of its divisors is an integer number (4120116).

Almost surely, 2^28160428 is an apocalyptic number.

It is an amenable number.

28160428 is a deficient number, since it is larger than the sum of its proper divisors (21280964).

28160428 is a wasteful number, since it uses less digits than its factorization.

28160428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22952 (or 22950 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28160428 is about 5306.6399915577. The cubic root of 28160428 is about 304.2377382013.

The spelling of 28160428 in words is "twenty-eight million, one hundred sixty thousand, four hundred twenty-eight".