18428156 has 12 divisors (see below), whose sum is σ = 32281200. Its totient is φ = 9204960.

The previous prime is 18428143. The next prime is 18428159. The reversal of 18428156 is 65182481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4520 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (2690100).

Almost surely, 2^18428156 is an apocalyptic number.

It is an amenable number.

18428156 is a deficient number, since it is larger than the sum of its proper divisors (13853044).

18428156 is a wasteful number, since it uses less digits than its factorization.

18428156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564 (or 4562 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 18428156 is about 4292.8028140132. The cubic root of 18428156 is about 264.1358154862.

The spelling of 18428156 in words is "eighteen million, four hundred twenty-eight thousand, one hundred fifty-six".