423421231896 has 640 divisors, whose sum is σ = 1408818216960. Its totient is φ = 117573120000.

The previous prime is 423421231873. The next prime is 423421231903. The reversal of 423421231896 is 698132124324.

423421231896 is a `hidden beast` number, since 4 + 2 + 34 + 212 + 318 + 96 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 563809521 + ... + 563810271.

It is an arithmetic number, because the mean of its divisors is an integer number (2201278464).

Almost surely, 2^423421231896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423421231896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704409108480).

423421231896 is an abundant number, since it is smaller than the sum of its proper divisors (985396985064).

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

423421231896 is a wasteful number, since it uses less digits than its factorization.

423421231896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 944 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 423421231896 in words is "four hundred twenty-three billion, four hundred twenty-one million, two hundred thirty-one thousand, eight hundred ninety-six".