400641068 has 24 divisors (see below), whose sum is σ = 740804400. Its totient is φ = 189062208.

The previous prime is 400641041. The next prime is 400641077. The reversal of 400641068 is 860146004.

It is a self number, because there is not a number n which added to its sum of digits gives 400641068.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10646 + ... + 30242.

It is an arithmetic number, because the mean of its divisors is an integer number (30866850).

Almost surely, 2^400641068 is an apocalyptic number.

It is an amenable number.

400641068 is a deficient number, since it is larger than the sum of its proper divisors (340163332).

400641068 is a wasteful number, since it uses less digits than its factorization.

400641068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19889 (or 19887 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 400641068 is about 20016.0202837627. The cubic root of 400641068 is about 737.1997087521.

The spelling of 400641068 in words is "four hundred million, six hundred forty-one thousand, sixty-eight".