180406885 has 4 divisors (see below), whose sum is σ = 216488268. Its totient is φ = 144325504.

The previous prime is 180406841. The next prime is 180406901. The reversal of 180406885 is 588604081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98069409 + 82337476 = 9903^2 + 9074^2 .

It is a cyclic number.

It is not a de Polignac number, because 180406885 - 2⁷ = 180406757 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18040684 + ... + 18040693.

It is an arithmetic number, because the mean of its divisors is an integer number (54122067).

Almost surely, 2^180406885 is an apocalyptic number.

It is an amenable number.

180406885 is a deficient number, since it is larger than the sum of its proper divisors (36081383).

180406885 is an equidigital number, since it uses as much as digits as its factorization.

180406885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36081382.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 180406885 is about 13431.5630140353. The cubic root of 180406885 is about 565.0467343283.

The spelling of 180406885 in words is "one hundred eighty million, four hundred six thousand, eight hundred eighty-five".