1240432312 has 64 divisors (see below), whose sum is σ = 2756088000. Its totient is φ = 512096256.

The previous prime is 1240432243. The next prime is 1240432337. The reversal of 1240432312 is 2132340421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228864 + ... + 1229872.

It is an arithmetic number, because the mean of its divisors is an integer number (43063875).

Almost surely, 2^1240432312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240432312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378044000).

1240432312 is an abundant number, since it is smaller than the sum of its proper divisors (1515655688).

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

1240432312 is a wasteful number, since it uses less digits than its factorization.

1240432312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1240432312 is about 35219.7716063009. The cubic root of 1240432312 is about 1074.4619083124.

Adding to 1240432312 its reverse (2132340421), we get a palindrome (3372772733).

The spelling of 1240432312 in words is "one billion, two hundred forty million, four hundred thirty-two thousand, three hundred twelve".