1423334440 has 64 divisors (see below), whose sum is σ = 3524679360. Its totient is φ = 512977920.

The previous prime is 1423334383. The next prime is 1423334453. The reversal of 1423334440 is 444333241.

It is a super-2 number, since 2×1423334440² = 4051761856180227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1423334399 and 1423334408.

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, 35407 + ... + 64033.

It is an arithmetic number, because the mean of its divisors is an integer number (55073115).

Almost surely, 2^1423334440 is an apocalyptic number.

1423334440 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 1423334440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762339680).

1423334440 is an abundant number, since it is smaller than the sum of its proper divisors (2101344920).

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

1423334440 is a wasteful number, since it uses less digits than its factorization.

1423334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28762 (or 28758 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 1423334440 is about 37727.1048451905. The cubic root of 1423334440 is about 1124.8699609364.

Adding to 1423334440 its reverse (444333241), we get a palindrome (1867667681).

The spelling of 1423334440 in words is "one billion, four hundred twenty-three million, three hundred thirty-four thousand, four hundred forty".