181143396 has 108 divisors (see below), whose sum is σ = 551170620. Its totient is φ = 49956480.

The previous prime is 181143373. The next prime is 181143401. The reversal of 181143396 is 693341181.

It can be written as a sum of positive squares in 2 ways, for example, as 85377600 + 95765796 = 9240^2 + 9786^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 181143396.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49386 + ... + 52926.

Almost surely, 2^181143396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181143396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275585310).

181143396 is an abundant number, since it is smaller than the sum of its proper divisors (370027224).

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

181143396 is a wasteful number, since it uses less digits than its factorization.

181143396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594 (or 3582 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 181143396 is about 13458.9522623420. The cubic root of 181143396 is about 565.8146246220.

The spelling of 181143396 in words is "one hundred eighty-one million, one hundred forty-three thousand, three hundred ninety-six".