28712064 has 32 divisors (see below), whose sum is σ = 76267440. Its totient is φ = 9570560.

The previous prime is 28712053. The next prime is 28712069. The reversal of 28712064 is 46021782.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (28712069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37002 + ... + 37769.

Almost surely, 2^28712064 is an apocalyptic number.

28712064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28712064 is an abundant number, since it is smaller than the sum of its proper divisors (47555376).

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

28712064 is an equidigital number, since it uses as much as digits as its factorization.

28712064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74788 (or 74776 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28712064 is about 5358.3639294098. The cubic root of 28712064 is about 306.2114818140.

The spelling of 28712064 in words is "twenty-eight million, seven hundred twelve thousand, sixty-four".