181270940 has 12 divisors (see below), whose sum is σ = 380669016. Its totient is φ = 72508368.

The previous prime is 181270937. The next prime is 181271003. The reversal of 181270940 is 49072181.

It is a junction number, because it is equal to n+sod(n) for n = 181270897 and 181270906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4531754 + ... + 4531793.

It is an arithmetic number, because the mean of its divisors is an integer number (31722418).

Almost surely, 2^181270940 is an apocalyptic number.

181270940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181270940 is an abundant number, since it is smaller than the sum of its proper divisors (199398076).

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

181270940 is a wasteful number, since it uses less digits than its factorization.

181270940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9063556 (or 9063554 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 181270940 is about 13463.6896874520. The cubic root of 181270940 is about 565.9473911322.

The spelling of 181270940 in words is "one hundred eighty-one million, two hundred seventy thousand, nine hundred forty".