401306020 has 12 divisors (see below), whose sum is σ = 842742684. Its totient is φ = 160522400.

The previous prime is 401305999. The next prime is 401306051. The reversal of 401306020 is 20603104.

It can be written as a sum of positive squares in 2 ways, for example, as 57426084 + 343879936 = 7578^2 + 18544^2 .

It is a super-2 number, since 2×401306020² = 322093043376480800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401305985 and 401306003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10032631 + ... + 10032670.

It is an arithmetic number, because the mean of its divisors is an integer number (70228557).

Almost surely, 2^401306020 is an apocalyptic number.

It is an amenable number.

401306020 is an abundant number, since it is smaller than the sum of its proper divisors (441436664).

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

401306020 is a wasteful number, since it uses less digits than its factorization.

401306020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20065310 (or 20065308 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 401306020 is about 20032.6238920417. The cubic root of 401306020 is about 737.6073316928.

Adding to 401306020 its reverse (20603104), we get a palindrome (421909124).

The spelling of 401306020 in words is "four hundred one million, three hundred six thousand, twenty".