28718932 has 48 divisors (see below), whose sum is σ = 57697920. Its totient is φ = 12387200.

The previous prime is 28718909. The next prime is 28718953. The reversal of 28718932 is 23981782.

Its product of digits (48384) is a multiple of the sum of its prime factors (432).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90438 + ... + 90754.

It is an arithmetic number, because the mean of its divisors is an integer number (1202040).

Almost surely, 2^28718932 is an apocalyptic number.

28718932 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28718932 is an abundant number, since it is smaller than the sum of its proper divisors (28978988).

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

28718932 is a wasteful number, since it uses less digits than its factorization.

28718932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 430 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 28718932 is about 5359.0047583483. The cubic root of 28718932 is about 306.2358953937.

The spelling of 28718932 in words is "twenty-eight million, seven hundred eighteen thousand, nine hundred thirty-two".