401858220220 has 12 divisors (see below), whose sum is σ = 843902262504. Its totient is φ = 160743288080.

The previous prime is 401858220199. The next prime is 401858220227. The reversal of 401858220220 is 22022858104.

It is a super-2 number, since 2×401858220220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401858220227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10046455486 + ... + 10046455525.

It is an arithmetic number, because the mean of its divisors is an integer number (70325188542).

Almost surely, 2^401858220220 is an apocalyptic number.

It is an amenable number.

401858220220 is an abundant number, since it is smaller than the sum of its proper divisors (442044042284).

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

401858220220 is a wasteful number, since it uses less digits than its factorization.

401858220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20092911020 (or 20092911018 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The spelling of 401858220220 in words is "four hundred one billion, eight hundred fifty-eight million, two hundred twenty thousand, two hundred twenty".