1423205456 has 40 divisors (see below), whose sum is σ = 2922462504. Its totient is φ = 669102080.

The previous prime is 1423205453. The next prime is 1423205467. The reversal of 1423205456 is 6545023241.

It can be written as a sum of positive squares in 4 ways, for example, as 557904400 + 865301056 = 23620^2 + 29416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423205453) 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, 401066 + ... + 404598.

Almost surely, 2^1423205456 is an apocalyptic number.

1423205456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1423205456 is an abundant number, since it is smaller than the sum of its proper divisors (1499257048).

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

1423205456 is a wasteful number, since it uses less digits than its factorization.

1423205456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039 (or 5033 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1423205456 is about 37725.3953723483. The cubic root of 1423205456 is about 1124.8359809605.

Adding to 1423205456 its reverse (6545023241), we get a palindrome (7968228697).

The spelling of 1423205456 in words is "one billion, four hundred twenty-three million, two hundred five thousand, four hundred fifty-six".