180394 has 4 divisors (see below), whose sum is σ = 270594. Its totient is φ = 90196.

The previous prime is 180391. The next prime is 180413. The reversal of 180394 is 493081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493081 = 43 ⋅11467.

It can be written as a sum of positive squares in only one way, i.e., 149769 + 30625 = 387^2 + 175^2 .

It is not an unprimeable number, because it can be changed into a prime (180391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45097 + ... + 45100.

2¹⁸⁰³⁹⁴ is an apocalyptic number.

180394 is a deficient number, since it is larger than the sum of its proper divisors (90200).

180394 is an equidigital number, since it uses as much as digits as its factorization.

180394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90199.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 180394 is about 424.7281483490. The cubic root of 180394 is about 56.5033281774.

The spelling of 180394 in words is "one hundred eighty thousand, three hundred ninety-four".