401791568 has 20 divisors (see below), whose sum is σ = 787220820. Its totient is φ = 198637824.

The previous prime is 401791519. The next prime is 401791597. The reversal of 401791568 is 865197104.

It can be written as a sum of positive squares in 2 ways, for example, as 279290944 + 122500624 = 16712^2 + 11068^2 .

It is a super-2 number, since 2×401791568² = 322872928231797248, 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 3 ways as a sum of consecutive naturals, for example, 139655 + ... + 142502.

It is an arithmetic number, because the mean of its divisors is an integer number (39361041).

Almost surely, 2^401791568 is an apocalyptic number.

It is an amenable number.

401791568 is a deficient number, since it is larger than the sum of its proper divisors (385429252).

401791568 is a wasteful number, since it uses less digits than its factorization.

401791568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282254 (or 282248 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 401791568 is about 20044.7391601886. The cubic root of 401791568 is about 737.9046936411.

The spelling of 401791568 in words is "four hundred one million, seven hundred ninety-one thousand, five hundred sixty-eight".