18078234 has 16 divisors (see below), whose sum is σ = 38059680. Its totient is φ = 5708880.

The previous prime is 18078217. The next prime is 18078257. The reversal of 18078234 is 43287081.

It is a junction number, because it is equal to n+sod(n) for n = 18078195 and 18078204.

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, 79177 + ... + 79404.

It is an arithmetic number, because the mean of its divisors is an integer number (2378730).

Almost surely, 2^18078234 is an apocalyptic number.

18078234 is an abundant number, since it is smaller than the sum of its proper divisors (19981446).

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

18078234 is a wasteful number, since it uses less digits than its factorization.

18078234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158605.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18078234 is about 4251.8506558909. The cubic root of 18078234 is about 262.4532778523.

The spelling of 18078234 in words is "eighteen million, seventy-eight thousand, two hundred thirty-four".