28328222 has 16 divisors (see below), whose sum is σ = 48453552. Its totient is φ = 12305280.

The previous prime is 28328213. The next prime is 28328233. The reversal of 28328222 is 22282382.

It is a congruent 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, 31604 + ... + 32487.

It is an arithmetic number, because the mean of its divisors is an integer number (3028347).

Almost surely, 2^28328222 is an apocalyptic number.

28328222 is a deficient number, since it is larger than the sum of its proper divisors (20125330).

28328222 is a wasteful number, since it uses less digits than its factorization.

28328222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64123.

The product of its digits is 6144, while the sum is 29.

The square root of 28328222 is about 5322.4263264042. The cubic root of 28328222 is about 304.8408091601.

The spelling of 28328222 in words is "twenty-eight million, three hundred twenty-eight thousand, two hundred twenty-two".