1440652140 has 72 divisors (see below), whose sum is σ = 4520683440. Its totient is φ = 370925184.

The previous prime is 1440652123. The next prime is 1440652141. The reversal of 1440652140 is 412560441.

1440652140 is a `hidden beast` number, since 1 + 4 + 4 + 0 + 652 + 1 + 4 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (1440652141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132774 + ... + 143213.

It is an arithmetic number, because the mean of its divisors is an integer number (62787270).

Almost surely, 2^1440652140 is an apocalyptic number.

1440652140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440652140 is an abundant number, since it is smaller than the sum of its proper divisors (3080031300).

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

1440652140 is a wasteful number, since it uses less digits than its factorization.

1440652140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276031 (or 276026 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1440652140 is about 37955.9236483582. The cubic root of 1440652140 is about 1129.4136776067.

The spelling of 1440652140 in words is "one billion, four hundred forty million, six hundred fifty-two thousand, one hundred forty".