423399456 has 144 divisors (see below), whose sum is σ = 1287861120. Its totient is φ = 131619840.

The previous prime is 423399437. The next prime is 423399463. The reversal of 423399456 is 654993324.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270805 + ... + 272363.

It is an arithmetic number, because the mean of its divisors is an integer number (8943480).

Almost surely, 2^423399456 is an apocalyptic number.

423399456 is a gapful number since it is divisible by the number (46) 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 423399456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643930560).

423399456 is an abundant number, since it is smaller than the sum of its proper divisors (864461664).

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

423399456 is a wasteful number, since it uses less digits than its factorization.

423399456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639 (or 1628 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 423399456 is about 20576.6726173111. The cubic root of 423399456 is about 750.9022953821.

The spelling of 423399456 in words is "four hundred twenty-three million, three hundred ninety-nine thousand, four hundred fifty-six".