423404100 has 162 divisors, whose sum is σ = 1543972794. Its totient is φ = 96768000.

The previous prime is 423404099. The next prime is 423404123. The reversal of 423404100 is 1404324.

It can be written as a sum of positive squares in 3 ways, for example, as 63011844 + 360392256 = 7938^2 + 18984^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 39300 + ... + 48900.

Almost surely, 2^423404100 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 423404100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771986397).

423404100 is an abundant number, since it is smaller than the sum of its proper divisors (1120568694).

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

423404100 is a wasteful number, since it uses less digits than its factorization.

423404100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9635 (or 9618 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 423404100 is about 20576.7854632350. The cubic root of 423404100 is about 750.9050407623.

Adding to 423404100 its reverse (1404324), we get a palindrome (424808424).

The spelling of 423404100 in words is "four hundred twenty-three million, four hundred four thousand, one hundred".