401705556 has 48 divisors (see below), whose sum is σ = 1075984896. Its totient is φ = 114261984.

The previous prime is 401705537. The next prime is 401705627. The reversal of 401705556 is 655507104.

It is a super-2 number, since 2×401705556² = 322734707442538272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8535 + ... + 29601.

It is an arithmetic number, because the mean of its divisors is an integer number (22416352).

Almost surely, 2^401705556 is an apocalyptic number.

It is an amenable number.

401705556 is an abundant number, since it is smaller than the sum of its proper divisors (674279340).

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

401705556 is a wasteful number, since it uses less digits than its factorization.

401705556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21308 (or 21306 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 401705556 is about 20042.5935447486. The cubic root of 401705556 is about 737.8520351709.

The spelling of 401705556 in words is "four hundred one million, seven hundred five thousand, five hundred fifty-six".