181896980 has 12 divisors (see below), whose sum is σ = 381983700. Its totient is φ = 72758784.

The previous prime is 181896971. The next prime is 181896983. The reversal of 181896980 is 89698181.

It is a happy number.

181896980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 142181776 + 39715204 = 11924^2 + 6302^2 .

It is a super-2 number, since 2×181896980² = 66173022666240800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181896983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4547405 + ... + 4547444.

It is an arithmetic number, because the mean of its divisors is an integer number (31831975).

Almost surely, 2^181896980 is an apocalyptic number.

181896980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181896980 is an abundant number, since it is smaller than the sum of its proper divisors (200086720).

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

181896980 is a wasteful number, since it uses less digits than its factorization.

181896980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9094858 (or 9094856 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 181896980 is about 13486.9188475352. The cubic root of 181896980 is about 566.5981639607.

The spelling of 181896980 in words is "one hundred eighty-one million, eight hundred ninety-six thousand, nine hundred eighty".