181461860 has 12 divisors (see below), whose sum is σ = 381069948. Its totient is φ = 72584736.

The previous prime is 181461857. The next prime is 181461883. The reversal of 181461860 is 68164181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46158436 + 135303424 = 6794^2 + 11632^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 181461860.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4536527 + ... + 4536566.

It is an arithmetic number, because the mean of its divisors is an integer number (31755829).

Almost surely, 2^181461860 is an apocalyptic number.

181461860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181461860 is an abundant number, since it is smaller than the sum of its proper divisors (199608088).

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

181461860 is a wasteful number, since it uses less digits than its factorization.

181461860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9073102 (or 9073100 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 181461860 is about 13470.7780027733. The cubic root of 181461860 is about 566.1460123490.

The spelling of 181461860 in words is "one hundred eighty-one million, four hundred sixty-one thousand, eight hundred sixty".