423330840 has 128 divisors (see below), whose sum is σ = 1415620800. Its totient is φ = 112527360.

The previous prime is 423330839. The next prime is 423330881. The reversal of 423330840 is 48033324.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640110 + ... + 640770.

Almost surely, 2^423330840 is an apocalyptic number.

423330840 is a gapful number since it is divisible by the number (40) 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 423330840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707810400).

423330840 is an abundant number, since it is smaller than the sum of its proper divisors (992289960).

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

423330840 is a wasteful number, since it uses less digits than its factorization.

423330840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 423330840 is about 20575.0052247867. The cubic root of 423330840 is about 750.8617295171.

The spelling of 423330840 in words is "four hundred twenty-three million, three hundred thirty thousand, eight hundred forty".