423402320 has 160 divisors (see below), whose sum is σ = 1137784320. Its totient is φ = 145080320.

The previous prime is 423402313. The next prime is 423402337. The reversal of 423402320 is 23204324.

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

It is a junction number, because it is equal to n+sod(n) for n = 423402292 and 423402301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1199264 + ... + 1199616.

It is an arithmetic number, because the mean of its divisors is an integer number (7111152).

Almost surely, 2^423402320 is an apocalyptic number.

423402320 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 423402320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568892160).

423402320 is an abundant number, since it is smaller than the sum of its proper divisors (714382000).

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

423402320 is a wasteful number, since it uses less digits than its factorization.

423402320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

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

The square root of 423402320 is about 20576.7422105638. The cubic root of 423402320 is about 750.9039884872.

Adding to 423402320 its reverse (23204324), we get a palindrome (446606644).

The spelling of 423402320 in words is "four hundred twenty-three million, four hundred two thousand, three hundred twenty".