28323684 has 27 divisors (see below), whose sum is σ = 71676787. Its totient is φ = 9430584.

The previous prime is 28323671. The next prime is 28323689. The reversal of 28323684 is 48632382.

The square root of 28323684 is 5322.

It is a perfect power (a square), and thus also a powerful number.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28323689) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31489 + ... + 32375.

Almost surely, 2^28323684 is an apocalyptic number.

28323684 is the 5322-nd square number.

It is an amenable number.

28323684 is an abundant number, since it is smaller than the sum of its proper divisors (43353103).

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

28323684 is an equidigital number, since it uses as much as digits as its factorization.

28323684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 892 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The cubic root of 28323684 is about 304.8245304415.

Multiplying 28323684 by its sum of digits (36), we get a square (1019652624 = 31932²).

28323684 divided by its sum of digits (36) gives a square (786769 = 887²).

The spelling of 28323684 in words is "twenty-eight million, three hundred twenty-three thousand, six hundred eighty-four".