423408240 has 120 divisors (see below), whose sum is σ = 1425884928. Its totient is φ = 112596480.

The previous prime is 423408191. The next prime is 423408247. The reversal of 423408240 is 42804324.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423408247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388977 + ... + 390063.

Almost surely, 2^423408240 is an apocalyptic number.

423408240 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 423408240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712942464).

423408240 is an abundant number, since it is smaller than the sum of its proper divisors (1002476688).

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

423408240 is a wasteful number, since it uses less digits than its factorization.

423408240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1638 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 423408240 is about 20576.8860617927. The cubic root of 423408240 is about 750.9074881774.

The spelling of 423408240 in words is "four hundred twenty-three million, four hundred eight thousand, two hundred forty".