28664022 has 16 divisors (see below), whose sum is σ = 58268592. Its totient is φ = 9397920.

The previous prime is 28663939. The next prime is 28664071. The reversal of 28664022 is 22046682.

It is a super-3 number, since 3×28664022³ (a number of 23 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 38793 + ... + 39524.

It is an arithmetic number, because the mean of its divisors is an integer number (3641787).

Almost surely, 2^28664022 is an apocalyptic number.

28664022 is an abundant number, since it is smaller than the sum of its proper divisors (29604570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28664022 is a wasteful number, since it uses less digits than its factorization.

28664022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78383.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28664022 is about 5353.8791544076. The cubic root of 28664022 is about 306.0405986545.

The spelling of 28664022 in words is "twenty-eight million, six hundred sixty-four thousand, twenty-two".