180649 has 8 divisors (see below), whose sum is σ = 209088. Its totient is φ = 152880.

The previous prime is 180647. The next prime is 180667. The reversal of 180649 is 946081.

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

It is not a de Polignac number, because 180649 - 2¹ = 180647 is a prime.

It is a super-2 number, since 2×180649² = 65268122402, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (180647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819 + ... + 1015.

It is an arithmetic number, because the mean of its divisors is an integer number (26136).

2¹⁸⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

180649 is a deficient number, since it is larger than the sum of its proper divisors (28439).

180649 is a wasteful number, since it uses less digits than its factorization.

180649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 180649 is about 425.0282343563. The cubic root of 180649 is about 56.5299394928.

The spelling of 180649 in words is "one hundred eighty thousand, six hundred forty-nine".