401821310838 has 16 divisors (see below), whose sum is σ = 803697762096. Its totient is φ = 133931246880.

The previous prime is 401821310809. The next prime is 401821310843. The reversal of 401821310838 is 838013128104.

It is a super-2 number, since 2×401821310838² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401821310796 and 401821310805.

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, 2202481 + ... + 2377932.

It is an arithmetic number, because the mean of its divisors is an integer number (50231110131).

Almost surely, 2^401821310838 is an apocalyptic number.

401821310838 is an abundant number, since it is smaller than the sum of its proper divisors (401876451258).

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

401821310838 is a wasteful number, since it uses less digits than its factorization.

401821310838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4595039.

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 401821310838 in words is "four hundred one billion, eight hundred twenty-one million, three hundred ten thousand, eight hundred thirty-eight".