1423431144 has 80 divisors (see below), whose sum is σ = 4094748900. Its totient is φ = 461645568.

The previous prime is 1423431137. The next prime is 1423431167. The reversal of 1423431144 is 4411343241.

It can be written as a sum of positive squares in 2 ways, for example, as 1416619044 + 6812100 = 37638^2 + 2610^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5709 + ... + 53660.

Almost surely, 2^1423431144 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 1423431144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2047374450).

1423431144 is an abundant number, since it is smaller than the sum of its proper divisors (2671317756).

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

1423431144 is a wasteful number, since it uses less digits than its factorization.

1423431144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59424 (or 59411 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1423431144 is about 37728.3864484025. The cubic root of 1423431144 is about 1124.8954356148.

Adding to 1423431144 its reverse (4411343241), we get a palindrome (5834774385).

The spelling of 1423431144 in words is "one billion, four hundred twenty-three million, four hundred thirty-one thousand, one hundred forty-four".