401569168 has 80 divisors (see below), whose sum is σ = 1044683136. Its totient is φ = 144414720.

The previous prime is 401569159. The next prime is 401569169. The reversal of 401569168 is 861965104.

It is a super-2 number, since 2×401569168² = 322515593376424448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401569168.

It is not an unprimeable number, because it can be changed into a prime (401569169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3480 + ... + 28552.

Almost surely, 2^401569168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401569168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522341568).

401569168 is an abundant number, since it is smaller than the sum of its proper divisors (643113968).

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

401569168 is a wasteful number, since it uses less digits than its factorization.

401569168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25112 (or 25106 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 401569168 is about 20039.1908020259. The cubic root of 401569168 is about 737.7685199749.

The spelling of 401569168 in words is "four hundred one million, five hundred sixty-nine thousand, one hundred sixty-eight".