6403857 has 8 divisors (see below), whose sum is σ = 8565600. Its totient is φ = 4255680.

The previous prime is 6403853. The next prime is 6403877. The reversal of 6403857 is 7583046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6403857 - 2² = 6403853 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6403853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2232 + ... + 4217.

It is an arithmetic number, because the mean of its divisors is an integer number (1070700).

Almost surely, 2^6403857 is an apocalyptic number.

It is an amenable number.

6403857 is a deficient number, since it is larger than the sum of its proper divisors (2161743).

6403857 is a wasteful number, since it uses less digits than its factorization.

6403857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 6403857 is about 2530.5843198756. The cubic root of 6403857 is about 185.7008429548.

It can be divided in two parts, 6403 and 857, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6403857 in words is "six million, four hundred three thousand, eight hundred fifty-seven".