180898402 has 16 divisors (see below), whose sum is σ = 280118520. Its totient is φ = 87550848.

The previous prime is 180898397. The next prime is 180898409. The reversal of 180898402 is 204898081.

It can be written as a sum of positive squares in 4 ways, for example, as 176650681 + 4247721 = 13291^2 + 2061^2 .

It is not an unprimeable number, because it can be changed into a prime (180898409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8374 + ... + 20782.

Almost surely, 2^180898402 is an apocalyptic number.

180898402 is a deficient number, since it is larger than the sum of its proper divisors (99220118).

180898402 is a wasteful number, since it uses less digits than its factorization.

180898402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12645.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 180898402 is about 13449.8476571298. The cubic root of 180898402 is about 565.5594239861.

The spelling of 180898402 in words is "one hundred eighty million, eight hundred ninety-eight thousand, four hundred two".