28398964 has 12 divisors (see below), whose sum is σ = 54216288. Its totient is φ = 12908600.

The previous prime is 28398961. The next prime is 28398973. The reversal of 28398964 is 46989382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28398961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322672 + ... + 322759.

It is an arithmetic number, because the mean of its divisors is an integer number (4518024).

Almost surely, 2^28398964 is an apocalyptic number.

It is an amenable number.

28398964 is a deficient number, since it is larger than the sum of its proper divisors (25817324).

28398964 is a wasteful number, since it uses less digits than its factorization.

28398964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645446 (or 645444 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 28398964 is about 5329.0678359353. The cubic root of 28398964 is about 305.0943504571.

The spelling of 28398964 in words is "twenty-eight million, three hundred ninety-eight thousand, nine hundred sixty-four".