28842720 has 48 divisors (see below), whose sum is σ = 90856080. Its totient is φ = 7691264.

The previous prime is 28842707. The next prime is 28842731. The reversal of 28842720 is 2724882.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29565 + ... + 30524.

It is an arithmetic number, because the mean of its divisors is an integer number (1892835).

Almost surely, 2^28842720 is an apocalyptic number.

28842720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28842720 is an abundant number, since it is smaller than the sum of its proper divisors (62013360).

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

28842720 is a wasteful number, since it uses less digits than its factorization.

28842720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60107 (or 60099 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28842720 is about 5370.5418721019. The cubic root of 28842720 is about 306.6752570582.

The spelling of 28842720 in words is "twenty-eight million, eight hundred forty-two thousand, seven hundred twenty".