28804932 has 72 divisors (see below), whose sum is σ = 79777880. Its totient is φ = 8709120.

The previous prime is 28804927. The next prime is 28804933. The reversal of 28804932 is 23940882.

It can be written as a sum of positive squares in 4 ways, for example, as 1179396 + 27625536 = 1086^2 + 5256^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28804933) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 28044 + ... + 29052.

Almost surely, 2^28804932 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 28804932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39888940).

28804932 is an abundant number, since it is smaller than the sum of its proper divisors (50972948).

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

28804932 is a wasteful number, since it uses less digits than its factorization.

28804932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1088 counting only the distinct ones).

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

The square root of 28804932 is about 5367.0226382977. The cubic root of 28804932 is about 306.5412693574.

The spelling of 28804932 in words is "twenty-eight million, eight hundred four thousand, nine hundred thirty-two".