28272418 has 16 divisors (see below), whose sum is σ = 44748000. Its totient is φ = 13360032.

The previous prime is 28272401. The next prime is 28272443. The reversal of 28272418 is 81427282.

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, 24478 + ... + 25606.

It is an arithmetic number, because the mean of its divisors is an integer number (2796750).

Almost surely, 2^28272418 is an apocalyptic number.

28272418 is a deficient number, since it is larger than the sum of its proper divisors (16475582).

28272418 is a wasteful number, since it uses less digits than its factorization.

28272418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809.

The product of its digits is 14336, while the sum is 34.

The square root of 28272418 is about 5317.1813961910. The cubic root of 28272418 is about 304.6405080962.

The spelling of 28272418 in words is "twenty-eight million, two hundred seventy-two thousand, four hundred eighteen".