181057140 has 288 divisors, whose sum is σ = 659594880. Its totient is φ = 41057280.

The previous prime is 181057139. The next prime is 181057159. The reversal of 181057140 is 41750181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1110699 + ... + 1110861.

It is an arithmetic number, because the mean of its divisors is an integer number (2290260).

Almost surely, 2^181057140 is an apocalyptic number.

181057140 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 181057140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329797440).

181057140 is an abundant number, since it is smaller than the sum of its proper divisors (478537740).

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

181057140 is a wasteful number, since it uses less digits than its factorization.

181057140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 181057140 is about 13455.7474708765. The cubic root of 181057140 is about 565.7248013918.

The spelling of 181057140 in words is "one hundred eighty-one million, fifty-seven thousand, one hundred forty".