181040980 has 12 divisors (see below), whose sum is σ = 380186100. Its totient is φ = 72416384.

The previous prime is 181040957. The next prime is 181040999. The reversal of 181040980 is 89040181.

It can be written as a sum of positive squares in 2 ways, for example, as 139901584 + 41139396 = 11828^2 + 6414^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4526005 + ... + 4526044.

It is an arithmetic number, because the mean of its divisors is an integer number (31682175).

Almost surely, 2^181040980 is an apocalyptic number.

181040980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181040980 is an abundant number, since it is smaller than the sum of its proper divisors (199145120).

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

181040980 is a wasteful number, since it uses less digits than its factorization.

181040980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052058 (or 9052056 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 181040980 is about 13455.1469705834. The cubic root of 181040980 is about 565.7079699010.

The spelling of 181040980 in words is "one hundred eighty-one million, forty thousand, nine hundred eighty".