28704064 has 28 divisors (see below), whose sum is σ = 57226708. Its totient is φ = 14284800.

The previous prime is 28704061. The next prime is 28704077. The reversal of 28704064 is 46040782.

It can be written as a sum of positive squares in 2 ways, for example, as 7617600 + 21086464 = 2760^2 + 4592^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704061) 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, 14494 + ... + 16354.

It is an arithmetic number, because the mean of its divisors is an integer number (2043811).

Almost surely, 2^28704064 is an apocalyptic number.

It is an amenable number.

28704064 is a deficient number, since it is larger than the sum of its proper divisors (28522644).

28704064 is a wasteful number, since it uses less digits than its factorization.

28704064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 28704064 is about 5357.6173808886. The cubic root of 28704064 is about 306.1830394212.

The spelling of 28704064 in words is "twenty-eight million, seven hundred four thousand, sixty-four".