180338465 has 16 divisors (see below), whose sum is σ = 229595472. Its totient is φ = 135512064.

The previous prime is 180338453. The next prime is 180338467. The reversal of 180338465 is 564833081.

It can be written as a sum of positive squares in 8 ways, for example, as 55413136 + 124925329 = 7444^2 + 11177^2 .

It is a cyclic number.

It is not a de Polignac number, because 180338465 - 2⁴ = 180338449 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (180338467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47207 + ... + 50883.

It is an arithmetic number, because the mean of its divisors is an integer number (14349717).

Almost surely, 2^180338465 is an apocalyptic number.

It is an amenable number.

180338465 is a deficient number, since it is larger than the sum of its proper divisors (49257007).

180338465 is a wasteful number, since it uses less digits than its factorization.

180338465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 180338465 is about 13429.0157867209. The cubic root of 180338465 is about 564.9752932522.

The spelling of 180338465 in words is "one hundred eighty million, three hundred thirty-eight thousand, four hundred sixty-five".