28502222 has 12 divisors (see below), whose sum is σ = 49733640. Its totient is φ = 12215196.

The previous prime is 28502197. The next prime is 28502231. The reversal of 28502222 is 22220582.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145322 + ... + 145517.

It is an arithmetic number, because the mean of its divisors is an integer number (4144470).

Almost surely, 2^28502222 is an apocalyptic number.

28502222 is a deficient number, since it is larger than the sum of its proper divisors (21231418).

28502222 is a wasteful number, since it uses less digits than its factorization.

28502222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290855 (or 290848 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 28502222 is about 5338.7472313268. The cubic root of 28502222 is about 305.4636752848.

The spelling of 28502222 in words is "twenty-eight million, five hundred two thousand, two hundred twenty-two".