423203420 has 48 divisors (see below), whose sum is σ = 915277440. Its totient is φ = 164275776.

The previous prime is 423203399. The next prime is 423203437. The reversal of 423203420 is 24302324.

It is a super-2 number, since 2×423203420² = 358202269399392800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 423203392 and 423203401.

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, 138671 + ... + 141689.

It is an arithmetic number, because the mean of its divisors is an integer number (19068280).

Almost surely, 2^423203420 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 423203420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457638720).

423203420 is an abundant number, since it is smaller than the sum of its proper divisors (492074020).

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

423203420 is a wasteful number, since it uses less digits than its factorization.

423203420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234 (or 3232 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 423203420 is about 20571.9085162267. The cubic root of 423203420 is about 750.7863870243.

Adding to 423203420 its reverse (24302324), we get a palindrome (447505744).

The spelling of 423203420 in words is "four hundred twenty-three million, two hundred three thousand, four hundred twenty".