28931824 has 20 divisors (see below), whose sum is σ = 59353344. Its totient is φ = 13614848.

The previous prime is 28931801. The next prime is 28931827. The reversal of 28931824 is 42813982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28931827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52912 + ... + 53455.

Almost surely, 2^28931824 is an apocalyptic number.

It is an amenable number.

28931824 is an abundant number, since it is smaller than the sum of its proper divisors (30421520).

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

28931824 is a wasteful number, since it uses less digits than its factorization.

28931824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106392 (or 106386 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 28931824 is about 5378.8310997837. The cubic root of 28931824 is about 306.9907370228.

The spelling of 28931824 in words is "twenty-eight million, nine hundred thirty-one thousand, eight hundred twenty-four".