421400322 has 96 divisors (see below), whose sum is σ = 1072431360. Its totient is φ = 117106560.

The previous prime is 421400281. The next prime is 421400339. The reversal of 421400322 is 223004124.

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

It is a junction number, because it is equal to n+sod(n) for n = 421400295 and 421400304.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 837523 + ... + 838025.

It is an arithmetic number, because the mean of its divisors is an integer number (11171160).

Almost surely, 2^421400322 is an apocalyptic number.

421400322 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 421400322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536215680).

421400322 is an abundant number, since it is smaller than the sum of its proper divisors (651031038).

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

421400322 is a wasteful number, since it uses less digits than its factorization.

421400322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 685 counting only the distinct ones).

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

The square root of 421400322 is about 20528.0374609947. The cubic root of 421400322 is about 749.7186037681.

Adding to 421400322 its reverse (223004124), we get a palindrome (644404446).

The spelling of 421400322 in words is "four hundred twenty-one million, four hundred thousand, three hundred twenty-two".