28712768 has 28 divisors (see below), whose sum is σ = 65117472. Its totient is φ = 12305280.

The previous prime is 28712759. The next prime is 28712807. The reversal of 28712768 is 86721782.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31598 + ... + 32493.

It is an arithmetic number, because the mean of its divisors is an integer number (2325624).

Almost surely, 2^28712768 is an apocalyptic number.

28712768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28712768 is an abundant number, since it is smaller than the sum of its proper divisors (36404704).

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

28712768 is an equidigital number, since it uses as much as digits as its factorization.

28712768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64110 (or 64100 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 28712768 is about 5358.4296207005. The cubic root of 28712768 is about 306.2139844916.

The spelling of 28712768 in words is "twenty-eight million, seven hundred twelve thousand, seven hundred sixty-eight".