181834394 has 24 divisors (see below), whose sum is σ = 317851380. Its totient is φ = 77789376.

The previous prime is 181834369. The next prime is 181834421. The reversal of 181834394 is 493438181.

181834394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 179694025 + 2140369 = 13405^2 + 1463^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68174 + ... + 70790.

Almost surely, 2^181834394 is an apocalyptic number.

181834394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

181834394 is a deficient number, since it is larger than the sum of its proper divisors (136016986).

181834394 is a wasteful number, since it uses less digits than its factorization.

181834394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342 (or 3335 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 181834394 is about 13484.5983996558. The cubic root of 181834394 is about 566.5331726296.

The spelling of 181834394 in words is "one hundred eighty-one million, eight hundred thirty-four thousand, three hundred ninety-four".