423403400 has 96 divisors (see below), whose sum is σ = 1131594240. Its totient is φ = 144322560.

The previous prime is 423403381. The next prime is 423403403. The reversal of 423403400 is 4304324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423403403) 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, 269417 + ... + 270983.

It is an arithmetic number, because the mean of its divisors is an integer number (11787440).

Almost surely, 2^423403400 is an apocalyptic number.

423403400 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 423403400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565797120).

423403400 is an abundant number, since it is smaller than the sum of its proper divisors (708190840).

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

423403400 is a wasteful number, since it uses less digits than its factorization.

423403400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 423403400 is about 20576.7684537684. The cubic root of 423403400 is about 750.9046269466.

Adding to 423403400 its reverse (4304324), we get a palindrome (427707724).

The spelling of 423403400 in words is "four hundred twenty-three million, four hundred three thousand, four hundred".