6404859 has 8 divisors (see below), whose sum is σ = 9488720. Its totient is φ = 4269888.

The previous prime is 6404837. The next prime is 6404873. The reversal of 6404859 is 9584046.

6404859 is a `hidden beast` number, since 640 + 4 + 8 + 5 + 9 = 666.

It is not a de Polignac number, because 6404859 - 2⁹ = 6404347 is a prime.

It is a super-3 number, since 3×6404859³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118582 + ... + 118635.

It is an arithmetic number, because the mean of its divisors is an integer number (1186090).

Almost surely, 2^6404859 is an apocalyptic number.

6404859 is a deficient number, since it is larger than the sum of its proper divisors (3083861).

6404859 is a wasteful number, since it uses less digits than its factorization.

6404859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237226 (or 237220 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6404859 is about 2530.7822901230. The cubic root of 6404859 is about 185.7105278755.

The spelling of 6404859 in words is "six million, four hundred four thousand, eight hundred fifty-nine".