423043320 has 64 divisors (see below), whose sum is σ = 1450437120. Its totient is φ = 96695424.

The previous prime is 423043277. The next prime is 423043321. The reversal of 423043320 is 23340324.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423043321) 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, 250972 + ... + 252651.

It is an arithmetic number, because the mean of its divisors is an integer number (22663080).

Almost surely, 2^423043320 is an apocalyptic number.

423043320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423043320 is an abundant number, since it is smaller than the sum of its proper divisors (1027393800).

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

423043320 is a wasteful number, since it uses less digits than its factorization.

423043320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503644 (or 503640 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 423043320 is about 20568.0169194796. The cubic root of 423043320 is about 750.6916996505.

Adding to 423043320 its reverse (23340324), we get a palindrome (446383644).

The spelling of 423043320 in words is "four hundred twenty-three million, forty-three thousand, three hundred twenty".