28904832 has 96 divisors (see below), whose sum is σ = 90777960. Its totient is φ = 8755200.

The previous prime is 28904831. The next prime is 28904839. The reversal of 28904832 is 23840982.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11532 + ... + 13812.

Almost surely, 2^28904832 is an apocalyptic number.

28904832 is a gapful number since it is divisible by the number (22) 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 28904832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45388980).

28904832 is an abundant number, since it is smaller than the sum of its proper divisors (61873128).

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

28904832 is a wasteful number, since it uses less digits than its factorization.

28904832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28904832 is about 5376.3214189630. The cubic root of 28904832 is about 306.8952381215.

The spelling of 28904832 in words is "twenty-eight million, nine hundred four thousand, eight hundred thirty-two".