28972822 has 8 divisors (see below), whose sum is σ = 43493400. Its totient is φ = 14475024.

The previous prime is 28972819. The next prime is 28972843. The reversal of 28972822 is 22827982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047 + ... + 7882.

It is an arithmetic number, because the mean of its divisors is an integer number (5436675).

Almost surely, 2^28972822 is an apocalyptic number.

28972822 is a deficient number, since it is larger than the sum of its proper divisors (14520578).

28972822 is a wasteful number, since it uses less digits than its factorization.

28972822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11390.

The product of its digits is 64512, while the sum is 40.

The square root of 28972822 is about 5382.6408016883. The cubic root of 28972822 is about 307.1356762183.

The spelling of 28972822 in words is "twenty-eight million, nine hundred seventy-two thousand, eight hundred twenty-two".