180798138 has 24 divisors (see below), whose sum is σ = 404366976. Its totient is φ = 58321800.

The previous prime is 180798131. The next prime is 180798173. The reversal of 180798138 is 831897081.

180798138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 180798093 and 180798102.

It is not an unprimeable number, because it can be changed into a prime (180798131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161448 + ... + 162563.

It is an arithmetic number, because the mean of its divisors is an integer number (16848624).

Almost surely, 2^180798138 is an apocalyptic number.

180798138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

180798138 is an abundant number, since it is smaller than the sum of its proper divisors (223568838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180798138 is a wasteful number, since it uses less digits than its factorization.

180798138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324050 (or 324047 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 180798138 is about 13446.1198120499. The cubic root of 180798138 is about 565.4549164668.

The spelling of 180798138 in words is "one hundred eighty million, seven hundred ninety-eight thousand, one hundred thirty-eight".