423973980 has 288 divisors, whose sum is σ = 1468051200. Its totient is φ = 101243520.

The previous prime is 423973943. The next prime is 423974039. The reversal of 423973980 is 89379324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9859839 + ... + 9859881.

It is an arithmetic number, because the mean of its divisors is an integer number (5097400).

Almost surely, 2^423973980 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 423973980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734025600).

423973980 is an abundant number, since it is smaller than the sum of its proper divisors (1044077220).

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

423973980 is a wasteful number, since it uses less digits than its factorization.

423973980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 423973980 is about 20590.6284508268. The cubic root of 423973980 is about 751.2417828325.

The spelling of 423973980 in words is "four hundred twenty-three million, nine hundred seventy-three thousand, nine hundred eighty".