423209867904 has 320 divisors, whose sum is σ = 1335548554560. Its totient is φ = 132573044736.

The previous prime is 423209867867. The next prime is 423209867911. The reversal of 423209867904 is 409768902324.

423209867904 is a `hidden beast` number, since 423 + 209 + 8 + 6 + 7 + 9 + 0 + 4 = 666.

It is a super-2 number, since 2×423209867904² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 156337719 + ... + 156340425.

It is an arithmetic number, because the mean of its divisors is an integer number (4173589233).

Almost surely, 2^423209867904 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 423209867904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667774277280).

423209867904 is an abundant number, since it is smaller than the sum of its proper divisors (912338686656).

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

423209867904 is a wasteful number, since it uses less digits than its factorization.

423209867904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3616 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 423209867904 in words is "four hundred twenty-three billion, two hundred nine million, eight hundred sixty-seven thousand, nine hundred four".