180899870 has 16 divisors (see below), whose sum is σ = 325851120. Its totient is φ = 72308544.

The previous prime is 180899867. The next prime is 180899879. The reversal of 180899870 is 78998081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180899879) 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, 10469 + ... + 21711.

It is an arithmetic number, because the mean of its divisors is an integer number (20365695).

Almost surely, 2^180899870 is an apocalyptic number.

180899870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180899870 is a deficient number, since it is larger than the sum of its proper divisors (144951250).

180899870 is a wasteful number, since it uses less digits than its factorization.

180899870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12859.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 180899870 is about 13449.9022301279. The cubic root of 180899870 is about 565.5609538300.

The spelling of 180899870 in words is "one hundred eighty million, eight hundred ninety-nine thousand, eight hundred seventy".