1431243240 has 128 divisors (see below), whose sum is σ = 4990464000. Its totient is φ = 321585408.

The previous prime is 1431243169. The next prime is 1431243257. The reversal of 1431243240 is 423421341.

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 1431243240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35121 + ... + 63999.

It is an arithmetic number, because the mean of its divisors is an integer number (38988000).

Almost surely, 2^1431243240 is an apocalyptic number.

1431243240 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 1431243240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495232000).

1431243240 is an abundant number, since it is smaller than the sum of its proper divisors (3559220760).

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

1431243240 is a wasteful number, since it uses less digits than its factorization.

1431243240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28959 (or 28955 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1431243240 is about 37831.7755332736. The cubic root of 1431243240 is about 1126.9495716320.

Adding to 1431243240 its reverse (423421341), we get a palindrome (1854664581).

The spelling of 1431243240 in words is "one billion, four hundred thirty-one million, two hundred forty-three thousand, two hundred forty".