181010340 has 144 divisors (see below), whose sum is σ = 660616320. Its totient is φ = 39191040.

The previous prime is 181010303. The next prime is 181010341. The reversal of 181010340 is 43010181.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (181010341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20160 + ... + 27720.

Almost surely, 2^181010340 is an apocalyptic number.

181010340 is a gapful number since it is divisible by the number (10) 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 181010340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330308160).

181010340 is an abundant number, since it is smaller than the sum of its proper divisors (479605980).

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

181010340 is a wasteful number, since it uses less digits than its factorization.

181010340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7602 (or 7597 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 181010340 is about 13454.0083246592. The cubic root of 181010340 is about 565.6760539776.

The spelling of 181010340 in words is "one hundred eighty-one million, ten thousand, three hundred forty".