180012540 has 96 divisors (see below), whose sum is σ = 517144320. Its totient is φ = 46771200.

The previous prime is 180012533. The next prime is 180012601. The reversal of 180012540 is 45210081.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 746820 + ... + 747060.

It is an arithmetic number, because the mean of its divisors is an integer number (5386920).

Almost surely, 2^180012540 is an apocalyptic number.

180012540 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 180012540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258572160).

180012540 is an abundant number, since it is smaller than the sum of its proper divisors (337131780).

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

180012540 is a wasteful number, since it uses less digits than its factorization.

180012540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 180012540 is about 13416.8751950668. The cubic root of 180012540 is about 564.6347287928.

The spelling of 180012540 in words is "one hundred eighty million, twelve thousand, five hundred forty".