421340022 has 64 divisors (see below), whose sum is σ = 954240000. Its totient is φ = 137782944.

The previous prime is 421340021. The next prime is 421340039. The reversal of 421340022 is 220043124.

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 = 421339977 and 421340004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421340021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1207104 + ... + 1207452.

It is an arithmetic number, because the mean of its divisors is an integer number (14910000).

Almost surely, 2^421340022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421340022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477120000).

421340022 is an abundant number, since it is smaller than the sum of its proper divisors (532899978).

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

421340022 is a wasteful number, since it uses less digits than its factorization.

421340022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 716 counting only the distinct ones).

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

The square root of 421340022 is about 20526.5686854866. The cubic root of 421340022 is about 749.6828418999.

Adding to 421340022 its reverse (220043124), we get a palindrome (641383146).

The spelling of 421340022 in words is "four hundred twenty-one million, three hundred forty thousand, twenty-two".