28880864 has 48 divisors (see below), whose sum is σ = 58988160. Its totient is φ = 13910400.

The previous prime is 28880857. The next prime is 28880869. The reversal of 28880864 is 46808882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191189 + ... + 191339.

It is an arithmetic number, because the mean of its divisors is an integer number (1228920).

Almost surely, 2^28880864 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 28880864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29494080).

28880864 is an abundant number, since it is smaller than the sum of its proper divisors (30107296).

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

28880864 is a wasteful number, since it uses less digits than its factorization.

28880864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The square root of 28880864 is about 5374.0919232927. The cubic root of 28880864 is about 306.8103884197.

The spelling of 28880864 in words is "twenty-eight million, eight hundred eighty thousand, eight hundred sixty-four".