28984704 has 128 divisors (see below), whose sum is σ = 90478080. Its totient is φ = 8048640.

The previous prime is 28984691. The next prime is 28984733. The reversal of 28984704 is 40748982.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×28984704² = 1680226131935232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110077 + ... + 110339.

It is an arithmetic number, because the mean of its divisors is an integer number (706860).

Almost surely, 2^28984704 is an apocalyptic number.

28984704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28984704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45239040).

28984704 is an abundant number, since it is smaller than the sum of its proper divisors (61493376).

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

28984704 is a wasteful number, since it uses less digits than its factorization.

28984704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28984704 is about 5383.7444218685. The cubic root of 28984704 is about 307.1776567951.

The spelling of 28984704 in words is "twenty-eight million, nine hundred eighty-four thousand, seven hundred four".