423213340 has 48 divisors (see below), whose sum is σ = 1011709440. Its totient is φ = 147202880.

The previous prime is 423213299. The next prime is 423213341. The reversal of 423213340 is 43312324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423213341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36760 + ... + 46879.

It is an arithmetic number, because the mean of its divisors is an integer number (21077280).

Almost surely, 2^423213340 is an apocalyptic number.

It is an amenable number.

423213340 is an abundant number, since it is smaller than the sum of its proper divisors (588496100).

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

423213340 is a wasteful number, since it uses less digits than its factorization.

423213340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83682 (or 83680 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 423213340 is about 20572.1496202998. The cubic root of 423213340 is about 750.7922531889.

Adding to 423213340 its reverse (43312324), we get a palindrome (466525664).

The spelling of 423213340 in words is "four hundred twenty-three million, two hundred thirteen thousand, three hundred forty".