1440645372 has 48 divisors (see below), whose sum is σ = 3826116000. Its totient is φ = 468501120.

The previous prime is 1440645329. The next prime is 1440645377. The reversal of 1440645372 is 2735460441.

1440645372 is a `hidden beast` number, since 1 + 4 + 4 + 0 + 645 + 3 + 7 + 2 = 666.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440645377) 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 15 ways as a sum of consecutive naturals, for example, 158247 + ... + 167102.

It is an arithmetic number, because the mean of its divisors is an integer number (79710750).

Almost surely, 2^1440645372 is an apocalyptic number.

1440645372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1440645372 is an abundant number, since it is smaller than the sum of its proper divisors (2385470628).

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

1440645372 is a wasteful number, since it uses less digits than its factorization.

1440645372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325403 (or 325395 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 1440645372 is about 37955.8344922095. The cubic root of 1440645372 is about 1129.4119089901.

The spelling of 1440645372 in words is "one billion, four hundred forty million, six hundred forty-five thousand, three hundred seventy-two".