28387832 has 16 divisors (see below), whose sum is σ = 58066200. Its totient is φ = 12903520.

The previous prime is 28387787. The next prime is 28387861. The reversal of 28387832 is 23878382.

It is a self number, because there is not a number n which added to its sum of digits gives 28387832.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 161207 + ... + 161382.

Almost surely, 2^28387832 is an apocalyptic number.

28387832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28387832 is an abundant number, since it is smaller than the sum of its proper divisors (29678368).

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

28387832 is a wasteful number, since it uses less digits than its factorization.

28387832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322606 (or 322602 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 28387832 is about 5328.0232732224. The cubic root of 28387832 is about 305.0544809960.

The spelling of 28387832 in words is "twenty-eight million, three hundred eighty-seven thousand, eight hundred thirty-two".