423789056 has 80 divisors (see below), whose sum is σ = 904863960. Its totient is φ = 197591040.

The previous prime is 423789049. The next prime is 423789077. The reversal of 423789056 is 650987324.

It can be written as a sum of positive squares in 4 ways, for example, as 185395456 + 238393600 = 13616^2 + 15440^2 .

It is a super-3 number, since 3×423789056³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 423788998 and 423789016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1575290 + ... + 1575558.

Almost surely, 2^423789056 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 423789056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452431980).

423789056 is an abundant number, since it is smaller than the sum of its proper divisors (481074904).

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

423789056 is a wasteful number, since it uses less digits than its factorization.

423789056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 423789056 is about 20586.1374716094. The cubic root of 423789056 is about 751.1325443377.

The spelling of 423789056 in words is "four hundred twenty-three million, seven hundred eighty-nine thousand, fifty-six".