18428394 has 16 divisors (see below), whose sum is σ = 36990432. Its totient is φ = 6120528.

The previous prime is 18428341. The next prime is 18428413. The reversal of 18428394 is 49382481.

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, 3729 + ... + 7124.

It is an arithmetic number, because the mean of its divisors is an integer number (2311902).

Almost surely, 2^18428394 is an apocalyptic number.

18428394 is an abundant number, since it is smaller than the sum of its proper divisors (18562038).

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

18428394 is a wasteful number, since it uses less digits than its factorization.

18428394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141.

The product of its digits is 55296, while the sum is 39.

The square root of 18428394 is about 4292.8305347405. The cubic root of 18428394 is about 264.1369525878.

The spelling of 18428394 in words is "eighteen million, four hundred twenty-eight thousand, three hundred ninety-four".