28855632 has 80 divisors (see below), whose sum is σ = 81119808. Its totient is φ = 8785920.

The previous prime is 28855621. The next prime is 28855649. The reversal of 28855632 is 23655882.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81568 + ... + 81920.

Almost surely, 2^28855632 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 28855632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40559904).

28855632 is an abundant number, since it is smaller than the sum of its proper divisors (52264176).

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

28855632 is a wasteful number, since it uses less digits than its factorization.

28855632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 502 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 28855632 is about 5371.7438509296. The cubic root of 28855632 is about 306.7210132626.

The spelling of 28855632 in words is "twenty-eight million, eight hundred fifty-five thousand, six hundred thirty-two".