423023420 has 12 divisors (see below), whose sum is σ = 888349224. Its totient is φ = 169209360.

The previous prime is 423023417. The next prime is 423023423. The reversal of 423023420 is 24320324.

It is an interprime number because it is at equal distance from previous prime (423023417) and next prime (423023423).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 21151171 = 423023420 / (4 + 2 + 3 + 0 + 2 + 3 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 423023392 and 423023401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423023423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10575566 + ... + 10575605.

It is an arithmetic number, because the mean of its divisors is an integer number (74029102).

Almost surely, 2^423023420 is an apocalyptic number.

It is an amenable number.

423023420 is an abundant number, since it is smaller than the sum of its proper divisors (465325804).

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

423023420 is a wasteful number, since it uses less digits than its factorization.

423023420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21151180 (or 21151178 counting only the distinct ones).

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

The square root of 423023420 is about 20567.5331530060. The cubic root of 423023420 is about 750.6799285951.

Adding to 423023420 its reverse (24320324), we get a palindrome (447343744).

The spelling of 423023420 in words is "four hundred twenty-three million, twenty-three thousand, four hundred twenty".