28320984 has 48 divisors (see below), whose sum is σ = 78783120. Its totient is φ = 9184320.

The previous prime is 28320979. The next prime is 28321061. The reversal of 28320984 is 48902382.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2652 + ... + 7979.

It is an arithmetic number, because the mean of its divisors is an integer number (1641315).

Almost surely, 2^28320984 is an apocalyptic number.

28320984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28320984 is an abundant number, since it is smaller than the sum of its proper divisors (50462136).

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

28320984 is a wasteful number, since it uses less digits than its factorization.

28320984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680 (or 10673 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28320984 is about 5321.7463299184. The cubic root of 28320984 is about 304.8148441734.

The spelling of 28320984 in words is "twenty-eight million, three hundred twenty thousand, nine hundred eighty-four".