1240214440 has 16 divisors (see below), whose sum is σ = 2790482580. Its totient is φ = 496085760.

The previous prime is 1240214419. The next prime is 1240214449. The reversal of 1240214440 is 444120421.

It can be written as a sum of positive squares in 2 ways, for example, as 1021825156 + 218389284 = 31966^2 + 14778^2 .

It is not an unprimeable number, because it can be changed into a prime (1240214449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15502641 + ... + 15502720.

Almost surely, 2^1240214440 is an apocalyptic number.

1240214440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240214440 is an abundant number, since it is smaller than the sum of its proper divisors (1550268140).

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

1240214440 is a wasteful number, since it uses less digits than its factorization.

1240214440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31005372 (or 31005368 counting only the distinct ones).

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

The square root of 1240214440 is about 35216.6784350824. The cubic root of 1240214440 is about 1074.3989977531.

Adding to 1240214440 its reverse (444120421), we get a palindrome (1684334861).

The spelling of 1240214440 in words is "one billion, two hundred forty million, two hundred fourteen thousand, four hundred forty".