28620984 has 32 divisors (see below), whose sum is σ = 81774720. Its totient is φ = 8177376.

The previous prime is 28620983. The next prime is 28620997. The reversal of 28620984 is 48902682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620983) by changing a digit.

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, 85014 + ... + 85349.

It is an arithmetic number, because the mean of its divisors is an integer number (2555460).

Almost surely, 2^28620984 is an apocalyptic number.

28620984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28620984 is an abundant number, since it is smaller than the sum of its proper divisors (53153736).

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

28620984 is a wasteful number, since it uses less digits than its factorization.

28620984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170379 (or 170375 counting only the distinct ones).

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

The square root of 28620984 is about 5349.8583158809. The cubic root of 28620984 is about 305.8873522736.

The spelling of 28620984 in words is "twenty-eight million, six hundred twenty thousand, nine hundred eighty-four".