28468664 has 72 divisors (see below), whose sum is σ = 65895480. Its totient is φ = 11293920.

The previous prime is 28468619. The next prime is 28468679. The reversal of 28468664 is 46686482.

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 17 ways as a sum of consecutive naturals, for example, 918329 + ... + 918359.

It is an arithmetic number, because the mean of its divisors is an integer number (915215).

Almost surely, 2^28468664 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 28468664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32947740).

28468664 is an abundant number, since it is smaller than the sum of its proper divisors (37426816).

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

28468664 is a wasteful number, since it uses less digits than its factorization.

28468664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 63 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 28468664 is about 5335.6034335396. The cubic root of 28468664 is about 305.3437457384.

The spelling of 28468664 in words is "twenty-eight million, four hundred sixty-eight thousand, six hundred sixty-four".