423780 has 48 divisors (see below), whose sum is σ = 1357440. Its totient is φ = 96768.

The previous prime is 423779. The next prime is 423781. The reversal of 423780 is 87324.

It is an interprime number because it is at equal distance from previous prime (423779) and next prime (423781).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 423780.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423780.

It is not an unprimeable number, because it can be changed into a prime (423781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85 + ... + 924.

It is an arithmetic number, because the mean of its divisors is an integer number (28280).

2⁴²³⁷⁸⁰ 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 423780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678720).

423780 is an abundant number, since it is smaller than the sum of its proper divisors (933660).

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

423780 is a wasteful number, since it uses less digits than its factorization.

423780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 423780 is about 650.9838707679. The cubic root of 423780 is about 75.1127193952.

The spelling of 423780 in words is "four hundred twenty-three thousand, seven hundred eighty".