181268940 has 48 divisors (see below), whose sum is σ = 508138848. Its totient is φ = 48282624.

The previous prime is 181268939. The next prime is 181268953. The reversal of 181268940 is 49862181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95844 + ... + 97716.

It is an arithmetic number, because the mean of its divisors is an integer number (10586226).

Almost surely, 2^181268940 is an apocalyptic number.

181268940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181268940 is an abundant number, since it is smaller than the sum of its proper divisors (326869908).

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

181268940 is a wasteful number, since it uses less digits than its factorization.

181268940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3498 (or 3496 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 181268940 is about 13463.6154134022. The cubic root of 181268940 is about 565.9453097194.

The spelling of 181268940 in words is "one hundred eighty-one million, two hundred sixty-eight thousand, nine hundred forty".