1440204140 has 12 divisors (see below), whose sum is σ = 3024428736. Its totient is φ = 576081648.

The previous prime is 1440204109. The next prime is 1440204163. The reversal of 1440204140 is 414020441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 72010207 = 1440204140 / (1 + 4 + 4 + 0 + 2 + 0 + 4 + 1 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36005084 + ... + 36005123.

It is an arithmetic number, because the mean of its divisors is an integer number (252035728).

Almost surely, 2^1440204140 is an apocalyptic number.

1440204140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440204140 is an abundant number, since it is smaller than the sum of its proper divisors (1584224596).

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

1440204140 is a wasteful number, since it uses less digits than its factorization.

1440204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72010216 (or 72010214 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1440204140 is about 37950.0216073720. The cubic root of 1440204140 is about 1129.2965941066.

Adding to 1440204140 its reverse (414020441), we get a palindrome (1854224581).

The spelling of 1440204140 in words is "one billion, four hundred forty million, two hundred four thousand, one hundred forty".