28838964 has 144 divisors (see below), whose sum is σ = 89187840. Its totient is φ = 7043520.

The previous prime is 28838951. The next prime is 28838977. The reversal of 28838964 is 46983882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28838951) and next prime (28838977).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 488767 + ... + 488825.

It is an arithmetic number, because the mean of its divisors is an integer number (619360).

Almost surely, 2^28838964 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 28838964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44593920).

28838964 is an abundant number, since it is smaller than the sum of its proper divisors (60348876).

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

28838964 is a wasteful number, since it uses less digits than its factorization.

28838964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 105 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 28838964 is about 5370.1921753323. The cubic root of 28838964 is about 306.6619443717.

The spelling of 28838964 in words is "twenty-eight million, eight hundred thirty-eight thousand, nine hundred sixty-four".