1240340432 has 20 divisors (see below), whose sum is σ = 2424430020. Its totient is φ = 614681088.

The previous prime is 1240340419. The next prime is 1240340441. The reversal of 1240340432 is 2340430421.

It can be written as a sum of positive squares in 2 ways, for example, as 444197776 + 796142656 = 21076^2 + 28216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1240340398 and 1240340407.

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, 341207 + ... + 344822.

It is an arithmetic number, because the mean of its divisors is an integer number (121221501).

Almost surely, 2^1240340432 is an apocalyptic number.

It is an amenable number.

1240340432 is a deficient number, since it is larger than the sum of its proper divisors (1184089588).

1240340432 is a wasteful number, since it uses less digits than its factorization.

1240340432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686150 (or 686144 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1240340432 is about 35218.4672011716. The cubic root of 1240340432 is about 1074.4353788526.

Adding to 1240340432 its reverse (2340430421), we get a palindrome (3580770853).

The spelling of 1240340432 in words is "one billion, two hundred forty million, three hundred forty thousand, four hundred thirty-two".