423343021040 has 80 divisors (see below), whose sum is σ = 1006783561728. Its totient is φ = 165475592448.

The previous prime is 423343021001. The next prime is 423343021093. The reversal of 423343021040 is 40120343324.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2330129 + ... + 2505231.

Almost surely, 2^423343021040 is an apocalyptic number.

423343021040 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 423343021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503391780864).

423343021040 is an abundant number, since it is smaller than the sum of its proper divisors (583440540688).

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

423343021040 is a wasteful number, since it uses less digits than its factorization.

423343021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175806 (or 175800 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 423343021040 its reverse (40120343324), we get a palindrome (463463364364).

The spelling of 423343021040 in words is "four hundred twenty-three billion, three hundred forty-three million, twenty-one thousand, forty".