28820164 has 6 divisors (see below), whose sum is σ = 50435294. Its totient is φ = 14410080.

The previous prime is 28820149. The next prime is 28820167. The reversal of 28820164 is 46102882.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 8749764 = 4480^2 + 2958^2 .

It is not an unprimeable number, because it can be changed into a prime (28820167) by changing a digit.

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 as a sum of consecutive naturals, namely, 3602517 + ... + 3602524.

Almost surely, 2^28820164 is an apocalyptic number.

It is an amenable number.

28820164 is a deficient number, since it is larger than the sum of its proper divisors (21615130).

28820164 is a wasteful number, since it uses less digits than its factorization.

28820164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205045 (or 7205043 counting only the distinct ones).

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

The square root of 28820164 is about 5368.4414870612. The cubic root of 28820164 is about 306.5952926734.

The spelling of 28820164 in words is "twenty-eight million, eight hundred twenty thousand, one hundred sixty-four".