423449856 has 126 divisors (see below), whose sum is σ = 1267847210. Its totient is φ = 141087744.

The previous prime is 423449843. The next prime is 423449857. The reversal of 423449856 is 658944324.

It can be written as a sum of positive squares in only one way, i.e., 255488256 + 167961600 = 15984^2 + 12960^2 .

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423449857) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 185490 + ... + 187758.

Almost surely, 2^423449856 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 423449856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633923605).

423449856 is an abundant number, since it is smaller than the sum of its proper divisors (844397354).

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

423449856 is an frugal number, since it uses more digits than its factorization.

423449856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303 (or 2274 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 423449856 is about 20577.8972686715. The cubic root of 423449856 is about 750.9320891333.

The spelling of 423449856 in words is "four hundred twenty-three million, four hundred forty-nine thousand, eight hundred fifty-six".