401343220 has 24 divisors (see below), whose sum is σ = 843308424. Its totient is φ = 160444416.

The previous prime is 401343203. The next prime is 401343233. The reversal of 401343220 is 22343104.

It can be written as a sum of positive squares in 4 ways, for example, as 44435556 + 356907664 = 6666^2 + 18892^2 .

It is a super-2 number, since 2×401343220² = 322152760479936800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37512 + ... + 47008.

It is an arithmetic number, because the mean of its divisors is an integer number (35137851).

Almost surely, 2^401343220 is an apocalyptic number.

It is an amenable number.

401343220 is an abundant number, since it is smaller than the sum of its proper divisors (441965204).

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

401343220 is a wasteful number, since it uses less digits than its factorization.

401343220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11619 (or 11617 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 401343220 is about 20033.5523559852. The cubic root of 401343220 is about 737.6301224008.

Adding to 401343220 its reverse (22343104), we get a palindrome (423686324).

The spelling of 401343220 in words is "four hundred one million, three hundred forty-three thousand, two hundred twenty".