401686790 has 16 divisors (see below), whose sum is σ = 761091120. Its totient is φ = 152218080.

The previous prime is 401686783. The next prime is 401686793. The reversal of 401686790 is 97686104.

It is a super-2 number, since 2×401686790² = 322704554521008200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401686793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056881 + ... + 1057260.

It is an arithmetic number, because the mean of its divisors is an integer number (47568195).

Almost surely, 2^401686790 is an apocalyptic number.

401686790 is a deficient number, since it is larger than the sum of its proper divisors (359404330).

401686790 is a wasteful number, since it uses less digits than its factorization.

401686790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114167.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 401686790 is about 20042.1253862957. The cubic root of 401686790 is about 737.8405452071.

The spelling of 401686790 in words is "four hundred one million, six hundred eighty-six thousand, seven hundred ninety".