28318964 has 12 divisors (see below), whose sum is σ = 51267300. Its totient is φ = 13671168.

The previous prime is 28318937. The next prime is 28318973. The reversal of 28318964 is 46981382.

It can be written as a sum of positive squares in 2 ways, for example, as 10510564 + 17808400 = 3242^2 + 4220^2 .

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, 121949 + ... + 122180.

It is an arithmetic number, because the mean of its divisors is an integer number (4272275).

Almost surely, 2^28318964 is an apocalyptic number.

It is an amenable number.

28318964 is a deficient number, since it is larger than the sum of its proper divisors (22948336).

28318964 is a wasteful number, since it uses less digits than its factorization.

28318964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244162 (or 244160 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 28318964 is about 5321.5565392092. The cubic root of 28318964 is about 304.8075970073.

The spelling of 28318964 in words is "twenty-eight million, three hundred eighteen thousand, nine hundred sixty-four".