1440172180 has 48 divisors (see below), whose sum is σ = 3132080784. Its totient is φ = 555909120.

The previous prime is 1440172159. The next prime is 1440172183. The reversal of 1440172180 is 812710441.

It can be written as a sum of positive squares in 8 ways, for example, as 496576656 + 943595524 = 22284^2 + 30718^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440172183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53524 + ... + 75796.

It is an arithmetic number, because the mean of its divisors is an integer number (65251683).

Almost surely, 2^1440172180 is an apocalyptic number.

1440172180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440172180 is an abundant number, since it is smaller than the sum of its proper divisors (1691908604).

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

1440172180 is a wasteful number, since it uses less digits than its factorization.

1440172180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22396 (or 22394 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1440172180 is about 37949.6005249067. The cubic root of 1440172180 is about 1129.2882405256.

The spelling of 1440172180 in words is "one billion, four hundred forty million, one hundred seventy-two thousand, one hundred eighty".