28680418 has 16 divisors (see below), whose sum is σ = 46541880. Its totient is φ = 13176576.

The previous prime is 28680409. The next prime is 28680433. The reversal of 28680418 is 81408682.

It can be written as a sum of positive squares in 4 ways, for example, as 20403289 + 8277129 = 4517^2 + 2877^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3546 + ... + 8362.

Almost surely, 2^28680418 is an apocalyptic number.

28680418 is a deficient number, since it is larger than the sum of its proper divisors (17861462).

28680418 is a wasteful number, since it uses less digits than its factorization.

28680418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 28680418 is about 5355.4101616963. The cubic root of 28680418 is about 306.0989399114.

The spelling of 28680418 in words is "twenty-eight million, six hundred eighty thousand, four hundred eighteen".