180405682 has 8 divisors (see below), whose sum is σ = 273091500. Its totient is φ = 89375184.

The previous prime is 180405677. The next prime is 180405689. The reversal of 180405682 is 286504081.

It can be written as a sum of positive squares in 2 ways, for example, as 150822961 + 29582721 = 12281^2 + 5439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (180405689) 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, 413557 + ... + 413992.

Almost surely, 2^180405682 is an apocalyptic number.

180405682 is a deficient number, since it is larger than the sum of its proper divisors (92685818).

180405682 is a wasteful number, since it uses less digits than its factorization.

180405682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827660.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 180405682 is about 13431.5182313840. The cubic root of 180405682 is about 565.0454783660.

The spelling of 180405682 in words is "one hundred eighty million, four hundred five thousand, six hundred eighty-two".