6401968 has 10 divisors (see below), whose sum is σ = 12403844. Its totient is φ = 3200976.

The previous prime is 6401963. The next prime is 6401971. The reversal of 6401968 is 8691046.

It is an Ulam number.

6401968 is a modest number, since divided by 1968 gives 64 as remainder.

It is not an unprimeable number, because it can be changed into a prime (6401963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200046 + ... + 200077.

Almost surely, 2^6401968 is an apocalyptic number.

It is an amenable number.

6401968 is a deficient number, since it is larger than the sum of its proper divisors (6001876).

6401968 is a wasteful number, since it uses less digits than its factorization.

6401968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400131 (or 400125 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6401968 is about 2530.2110583902. The cubic root of 6401968 is about 185.6825819084.

The spelling of 6401968 in words is "six million, four hundred one thousand, nine hundred sixty-eight".