1240412440 has 16 divisors (see below), whose sum is σ = 2790928080. Its totient is φ = 496164960.

The previous prime is 1240412419. The next prime is 1240412501. The reversal of 1240412440 is 442140421.

It is a congruent number.

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, 15505116 + ... + 15505195.

It is an arithmetic number, because the mean of its divisors is an integer number (174433005).

Almost surely, 2^1240412440 is an apocalyptic number.

1240412440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240412440 is an abundant number, since it is smaller than the sum of its proper divisors (1550515640).

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

1240412440 is a wasteful number, since it uses less digits than its factorization.

1240412440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31010322 (or 31010318 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1240412440 is about 35219.4894909055. The cubic root of 1240412440 is about 1074.4561705760.

Adding to 1240412440 its reverse (442140421), we get a palindrome (1682552861).

The spelling of 1240412440 in words is "one billion, two hundred forty million, four hundred twelve thousand, four hundred forty".