1431344420 has 24 divisors (see below), whose sum is σ = 3279080448. Its totient is φ = 520488800.

The previous prime is 1431344419. The next prime is 1431344429. The reversal of 1431344420 is 244431341.

It is a self number, because there is not a number n which added to its sum of digits gives 1431344420.

It is not an unprimeable number, because it can be changed into a prime (1431344429) 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, 3252836 + ... + 3253275.

It is an arithmetic number, because the mean of its divisors is an integer number (136628352).

Almost surely, 2^1431344420 is an apocalyptic number.

1431344420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1431344420 is an abundant number, since it is smaller than the sum of its proper divisors (1847736028).

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

1431344420 is a wasteful number, since it uses less digits than its factorization.

1431344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506131 (or 6506129 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1431344420 is about 37833.1127453187. The cubic root of 1431344420 is about 1126.9761271160.

Adding to 1431344420 its reverse (244431341), we get a palindrome (1675775761).

The spelling of 1431344420 in words is "one billion, four hundred thirty-one million, three hundred forty-four thousand, four hundred twenty".