28418664 has 32 divisors (see below), whose sum is σ = 72969120. Its totient is φ = 9216576.

The previous prime is 28418659. The next prime is 28418669. The reversal of 28418664 is 46681482.

It is an interprime number because it is at equal distance from previous prime (28418659) and next prime (28418669).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28418669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15114 + ... + 16889.

It is an arithmetic number, because the mean of its divisors is an integer number (2280285).

Almost surely, 2^28418664 is an apocalyptic number.

28418664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28418664 is an abundant number, since it is smaller than the sum of its proper divisors (44550456).

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

28418664 is a wasteful number, since it uses less digits than its factorization.

28418664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32049 (or 32045 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 28418664 is about 5330.9158687790. The cubic root of 28418664 is about 305.1648808407.

The spelling of 28418664 in words is "twenty-eight million, four hundred eighteen thousand, six hundred sixty-four".