181142892 has 144 divisors (see below), whose sum is σ = 551183360. Its totient is φ = 50948352.

The previous prime is 181142891. The next prime is 181142947. The reversal of 181142892 is 298241181.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181142891) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 537348 + ... + 537684.

Almost surely, 2^181142892 is an apocalyptic number.

181142892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181142892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275591680).

181142892 is an abundant number, since it is smaller than the sum of its proper divisors (370040468).

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

181142892 is a wasteful number, since it uses less digits than its factorization.

181142892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 428 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 181142892 is about 13458.9335387318. The cubic root of 181142892 is about 565.8140998613.

The spelling of 181142892 in words is "one hundred eighty-one million, one hundred forty-two thousand, eight hundred ninety-two".