401668838 has 16 divisors (see below), whose sum is σ = 607521600. Its totient is φ = 199167336.

The previous prime is 401668823. The next prime is 401668847. The reversal of 401668838 is 838866104.

It is a super-2 number, since 2×401668838² = 322675710840540488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190313 + ... + 192411.

It is an arithmetic number, because the mean of its divisors is an integer number (37970100).

Almost surely, 2^401668838 is an apocalyptic number.

401668838 is a deficient number, since it is larger than the sum of its proper divisors (205852762).

401668838 is a wasteful number, since it uses less digits than its factorization.

401668838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 401668838 is about 20041.6775245986. The cubic root of 401668838 is about 737.8295533007.

The spelling of 401668838 in words is "four hundred one million, six hundred sixty-eight thousand, eight hundred thirty-eight".