28029664 has 72 divisors (see below), whose sum is σ = 61426512. Its totient is φ = 12579840.

The previous prime is 28029653. The next prime is 28029671. The reversal of 28029664 is 46692082.

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 11 ways as a sum of consecutive naturals, for example, 383932 + ... + 384004.

It is an arithmetic number, because the mean of its divisors is an integer number (853146).

Almost surely, 2^28029664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28029664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30713256).

28029664 is an abundant number, since it is smaller than the sum of its proper divisors (33396848).

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

28029664 is a wasteful number, since it uses less digits than its factorization.

28029664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 28029664 is about 5294.3048646635. The cubic root of 28029664 is about 303.7660943111.

The spelling of 28029664 in words is "twenty-eight million, twenty-nine thousand, six hundred sixty-four".