1440051240 has 128 divisors (see below), whose sum is σ = 4388567040. Its totient is φ = 377984256.

The previous prime is 1440051227. The next prime is 1440051271. The reversal of 1440051240 is 421500441.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3250459 + ... + 3250901.

It is an arithmetic number, because the mean of its divisors is an integer number (34285680).

Almost surely, 2^1440051240 is an apocalyptic number.

1440051240 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 1440051240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2194283520).

1440051240 is an abundant number, since it is smaller than the sum of its proper divisors (2948515800).

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

1440051240 is a wasteful number, since it uses less digits than its factorization.

1440051240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1440051240 is about 37948.0070622951. The cubic root of 1440051240 is about 1129.2566285778.

Adding to 1440051240 its reverse (421500441), we get a palindrome (1861551681).

The spelling of 1440051240 in words is "one billion, four hundred forty million, fifty-one thousand, two hundred forty".