1240041440 has 48 divisors (see below), whose sum is σ = 3195929520. Its totient is φ = 450923520.

The previous prime is 1240041431. The next prime is 1240041449. The reversal of 1240041440 is 441400421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1240041431) and next prime (1240041449).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240041449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350525 + ... + 354044.

It is an arithmetic number, because the mean of its divisors is an integer number (66581865).

Almost surely, 2^1240041440 is an apocalyptic number.

1240041440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240041440 is an abundant number, since it is smaller than the sum of its proper divisors (1955888080).

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

1240041440 is a wasteful number, since it uses less digits than its factorization.

1240041440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704595 (or 704587 counting only the distinct ones).

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

The square root of 1240041440 is about 35214.2221268623. Note that the first 3 decimals coincide. The cubic root of 1240041440 is about 1074.3490387396.

Adding to 1240041440 its reverse (441400421), we get a palindrome (1681441861).

The spelling of 1240041440 in words is "one billion, two hundred forty million, forty-one thousand, four hundred forty".