28518912 has 80 divisors (see below), whose sum is σ = 84458880. Its totient is φ = 9501696.

The previous prime is 28518907. The next prime is 28518913. The reversal of 28518912 is 21981582.

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 (28518913) 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, 12793 + ... + 14855.

It is an arithmetic number, because the mean of its divisors is an integer number (1055736).

Almost surely, 2^28518912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28518912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42229440).

28518912 is an abundant number, since it is smaller than the sum of its proper divisors (55939968).

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

28518912 is an equidigital number, since it uses as much as digits as its factorization.

28518912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090 (or 2068 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 28518912 is about 5340.3101033554. The cubic root of 28518912 is about 305.5232869407.

The spelling of 28518912 in words is "twenty-eight million, five hundred eighteen thousand, nine hundred twelve".