181342764 has 72 divisors (see below), whose sum is σ = 503543040. Its totient is φ = 54771552.

The previous prime is 181342753. The next prime is 181342769. The reversal of 181342764 is 467243181.

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 not an unprimeable number, because it can be changed into a prime (181342769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9969 + ... + 21495.

Almost surely, 2^181342764 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 181342764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251771520).

181342764 is an abundant number, since it is smaller than the sum of its proper divisors (322200276).

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

181342764 is a wasteful number, since it uses less digits than its factorization.

181342764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11579 (or 11574 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 181342764 is about 13466.3567456087. The cubic root of 181342764 is about 566.0221286824.

It can be divided in two parts, 181342 and 764, that added together give a triangular number (182106 = T₆₀₃).

The spelling of 181342764 in words is "one hundred eighty-one million, three hundred forty-two thousand, seven hundred sixty-four".