28206984 has 32 divisors (see below), whose sum is σ = 75942720. Its totient is φ = 8678976.

The previous prime is 28206979. The next prime is 28206991. The reversal of 28206984 is 48960282.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44892 + ... + 45515.

It is an arithmetic number, because the mean of its divisors is an integer number (2373210).

Almost surely, 2^28206984 is an apocalyptic number.

28206984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28206984 is an abundant number, since it is smaller than the sum of its proper divisors (47735736).

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

28206984 is a wasteful number, since it uses less digits than its factorization.

28206984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90429 (or 90425 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28206984 is about 5311.0247598745. The cubic root of 28206984 is about 304.4053054194.

The spelling of 28206984 in words is "twenty-eight million, two hundred six thousand, nine hundred eighty-four".