28418234 has 16 divisors (see below), whose sum is σ = 46425960. Its totient is φ = 12967680.

The previous prime is 28418233. The next prime is 28418239. The reversal of 28418234 is 43281482.

It can be written as a sum of positive squares in 4 ways, for example, as 20839225 + 7579009 = 4565^2 + 2753^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28418234.

It is not an unprimeable number, because it can be changed into a prime (28418233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3827 + ... + 8454.

Almost surely, 2^28418234 is an apocalyptic number.

28418234 is a deficient number, since it is larger than the sum of its proper divisors (18007726).

28418234 is a wasteful number, since it uses less digits than its factorization.

28418234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12385.

The product of its digits is 12288, while the sum is 32.

The square root of 28418234 is about 5330.8755378455. The cubic root of 28418234 is about 305.1633416930.

The spelling of 28418234 in words is "twenty-eight million, four hundred eighteen thousand, two hundred thirty-four".