6403868 has 6 divisors (see below), whose sum is σ = 11206776. Its totient is φ = 3201932.

The previous prime is 6403853. The next prime is 6403877. The reversal of 6403868 is 8683046.

It is a super-2 number, since 2×6403868² = 82019050722848, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800480 + ... + 800487.

It is an arithmetic number, because the mean of its divisors is an integer number (1867796).

Almost surely, 2^6403868 is an apocalyptic number.

It is an amenable number.

6403868 is a deficient number, since it is larger than the sum of its proper divisors (4802908).

6403868 is a wasteful number, since it uses less digits than its factorization.

6403868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600971 (or 1600969 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 6403868 is about 2530.5864932857. The cubic root of 6403868 is about 185.7009492818.

The spelling of 6403868 in words is "six million, four hundred three thousand, eight hundred sixty-eight".