423169920 has 224 divisors, whose sum is σ = 1518439320. Its totient is φ = 112720896.

The previous prime is 423169909. The next prime is 423169927. The reversal of 423169920 is 29961324.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423169927) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 466107 + ... + 467013.

Almost surely, 2^423169920 is an apocalyptic number.

423169920 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 423169920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759219660).

423169920 is an abundant number, since it is smaller than the sum of its proper divisors (1095269400).

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

423169920 is an frugal number, since it uses more digits than its factorization.

423169920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 423169920 is about 20571.0942829982. The cubic root of 423169920 is about 750.7665762143.

The spelling of 423169920 in words is "four hundred twenty-three million, one hundred sixty-nine thousand, nine hundred twenty".