401686338 has 8 divisors (see below), whose sum is σ = 803372688. Its totient is φ = 133895444.

The previous prime is 401686333. The next prime is 401686343. The reversal of 401686338 is 833686104.

It is an interprime number because it is at equal distance from previous prime (401686333) and next prime (401686343).

It is a sphenic number, since it is the product of 3 distinct primes.

401686338 is an admirable number.

It is a super-2 number, since 2×401686338² = 322703828271700488, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 401686296 and 401686305.

It is not an unprimeable number, because it can be changed into a prime (401686331) by changing a digit.

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, 33473856 + ... + 33473867.

It is an arithmetic number, because the mean of its divisors is an integer number (100421586).

Almost surely, 2^401686338 is an apocalyptic number.

401686338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

401686338 is a wasteful number, since it uses less digits than its factorization.

401686338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66947728.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 401686338 is about 20042.1141100434. The cubic root of 401686338 is about 737.8402684541.

The spelling of 401686338 in words is "four hundred one million, six hundred eighty-six thousand, three hundred thirty-eight".