401709222 has 48 divisors (see below), whose sum is σ = 922776192. Its totient is φ = 126074880.

The previous prime is 401709221. The next prime is 401709223. The reversal of 401709222 is 222907104.

It is an interprime number because it is at equal distance from previous prime (401709221) and next prime (401709223).

It is a super-2 number, since 2×401709222² = 322740598079690568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401709221) 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, 10918 + ... + 30374.

It is an arithmetic number, because the mean of its divisors is an integer number (19224504).

Almost surely, 2^401709222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401709222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461388096).

401709222 is an abundant number, since it is smaller than the sum of its proper divisors (521066970).

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

401709222 is a wasteful number, since it uses less digits than its factorization.

401709222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19533 (or 19530 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 401709222 is about 20042.6849997699. The cubic root of 401709222 is about 737.8542797314.

The spelling of 401709222 in words is "four hundred one million, seven hundred nine thousand, two hundred twenty-two".