28203984 has 40 divisors (see below), whose sum is σ = 80957120. Its totient is φ = 9401184.

The previous prime is 28203983. The next prime is 28203991. The reversal of 28203984 is 48930282.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28203983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32212 + ... + 33075.

It is an arithmetic number, because the mean of its divisors is an integer number (2023928).

Almost surely, 2^28203984 is an apocalyptic number.

28203984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28203984 is an abundant number, since it is smaller than the sum of its proper divisors (52753136).

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

28203984 is a wasteful number, since it uses less digits than its factorization.

28203984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65304 (or 65292 counting only the distinct ones).

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

The square root of 28203984 is about 5310.7423209943. The cubic root of 28203984 is about 304.3945131951.

The spelling of 28203984 in words is "twenty-eight million, two hundred three thousand, nine hundred eighty-four".