423401020 has 72 divisors (see below), whose sum is σ = 1062450144. Its totient is φ = 138830208.

The previous prime is 423401009. The next prime is 423401021. The reversal of 423401020 is 20104324.

It is a junction number, because it is equal to n+sod(n) for n = 423400985 and 423401003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423401021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71202 + ... + 76918.

It is an arithmetic number, because the mean of its divisors is an integer number (14756252).

Almost surely, 2^423401020 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 423401020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531225072).

423401020 is an abundant number, since it is smaller than the sum of its proper divisors (639049124).

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

423401020 is a wasteful number, since it uses less digits than its factorization.

423401020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779 (or 5754 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 423401020 is about 20576.7106214769. The cubic root of 423401020 is about 750.9032199697.

Adding to 423401020 its reverse (20104324), we get a palindrome (443505344).

The spelling of 423401020 in words is "four hundred twenty-three million, four hundred one thousand, twenty".