1423136256 has 160 divisors (see below), whose sum is σ = 4018671360. Its totient is φ = 446767104.

The previous prime is 1423136243. The next prime is 1423136263. The reversal of 1423136256 is 6526313241.

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, 1915021 + ... + 1915763.

It is an arithmetic number, because the mean of its divisors is an integer number (25116696).

Almost surely, 2^1423136256 is an apocalyptic number.

1423136256 is a gapful number since it is divisible by the number (16) 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 1423136256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2009335680).

1423136256 is an abundant number, since it is smaller than the sum of its proper divisors (2595535104).

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

1423136256 is an equidigital number, since it uses as much as digits as its factorization.

1423136256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 820 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 1423136256 is about 37724.4782071270. The cubic root of 1423136256 is about 1124.8177498351.

Adding to 1423136256 its reverse (6526313241), we get a palindrome (7949449497).

The spelling of 1423136256 in words is "one billion, four hundred twenty-three million, one hundred thirty-six thousand, two hundred fifty-six".