1240243432 has 32 divisors (see below), whose sum is σ = 2499016320. Its totient is φ = 574928640.

The previous prime is 1240243409. The next prime is 1240243439. The reversal of 1240243432 is 2343420421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1240243397 and 1240243406.

It is not an unprimeable number, because it can be changed into a prime (1240243439) 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, 58944 + ... + 77167.

It is an arithmetic number, because the mean of its divisors is an integer number (78094260).

Almost surely, 2^1240243432 is an apocalyptic number.

It is an amenable number.

1240243432 is an abundant number, since it is smaller than the sum of its proper divisors (1258772888).

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

1240243432 is a wasteful number, since it uses less digits than its factorization.

1240243432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136201 (or 136197 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1240243432 is about 35217.0900558237. The cubic root of 1240243432 is about 1074.4073696206.

Adding to 1240243432 its reverse (2343420421), we get a palindrome (3583663853).

The spelling of 1240243432 in words is "one billion, two hundred forty million, two hundred forty-three thousand, four hundred thirty-two".