28402064 has 20 divisors (see below), whose sum is σ = 56068956. Its totient is φ = 13932672.

The previous prime is 28402063. The next prime is 28402067. The reversal of 28402064 is 46020482.

It can be written as a sum of positive squares in 2 ways, for example, as 26091664 + 2310400 = 5108^2 + 1520^2 .

It is not an unprimeable number, because it can be changed into a prime (28402061) 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, 15899 + ... + 17594.

Almost surely, 2^28402064 is an apocalyptic number.

It is an amenable number.

28402064 is a deficient number, since it is larger than the sum of its proper divisors (27666892).

28402064 is a wasteful number, since it uses less digits than its factorization.

28402064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33554 (or 33548 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 28402064 is about 5329.3586856206. The cubic root of 28402064 is about 305.1054513090.

The spelling of 28402064 in words is "twenty-eight million, four hundred two thousand, sixty-four".