1232312240 has 80 divisors (see below), whose sum is σ = 2956343520. Its totient is φ = 477480960.

The previous prime is 1232312219. The next prime is 1232312251. The reversal of 1232312240 is 422132321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 325076 + ... + 328844.

It is an arithmetic number, because the mean of its divisors is an integer number (36954294).

Almost surely, 2^1232312240 is an apocalyptic number.

1232312240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1232312240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478171760).

1232312240 is an abundant number, since it is smaller than the sum of its proper divisors (1724031280).

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

1232312240 is a wasteful number, since it uses less digits than its factorization.

1232312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910 (or 3904 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1232312240 is about 35104.3051490839. The cubic root of 1232312240 is about 1072.1122394918.

Adding to 1232312240 its reverse (422132321), we get a palindrome (1654444561).

The spelling of 1232312240 in words is "one billion, two hundred thirty-two million, three hundred twelve thousand, two hundred forty".