1423435520 has 144 divisors (see below), whose sum is σ = 3705543072. Its totient is φ = 520765440.

The previous prime is 1423435511. The next prime is 1423435553. The reversal of 1423435520 is 255343241.

It is a happy number.

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, 2179514 + ... + 2180166.

It is an arithmetic number, because the mean of its divisors is an integer number (25732938).

Almost surely, 2^1423435520 is an apocalyptic number.

1423435520 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 1423435520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852771536).

1423435520 is an abundant number, since it is smaller than the sum of its proper divisors (2282107552).

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

1423435520 is a wasteful number, since it uses less digits than its factorization.

1423435520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 1423435520 is about 37728.4444418266. Note that the first 5 decimals coincide. The cubic root of 1423435520 is about 1124.8965883546.

Adding to 1423435520 its reverse (255343241), we get a palindrome (1678778761).

The spelling of 1423435520 in words is "one billion, four hundred twenty-three million, four hundred thirty-five thousand, five hundred twenty".