1240234440 has 64 divisors (see below), whose sum is σ = 3726336960. Its totient is φ = 330228480.

The previous prime is 1240234421. The next prime is 1240234447. The reversal of 1240234440 is 444320421.

It is a happy number.

1240234440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1240234440² = 3076362932324227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1240234440.

It is not an unprimeable number, because it can be changed into a prime (1240234447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75442 + ... + 90398.

It is an arithmetic number, because the mean of its divisors is an integer number (58224015).

Almost surely, 2^1240234440 is an apocalyptic number.

1240234440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240234440 is an abundant number, since it is smaller than the sum of its proper divisors (2486102520).

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

1240234440 is a wasteful number, since it uses less digits than its factorization.

1240234440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15662 (or 15658 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1240234440 is about 35216.9623903028. The cubic root of 1240234440 is about 1074.4047730620.

Adding to 1240234440 its reverse (444320421), we get a palindrome (1684554861).

The spelling of 1240234440 in words is "one billion, two hundred forty million, two hundred thirty-four thousand, four hundred forty".