6400345 has 8 divisors (see below), whose sum is σ = 8777664. Its totient is φ = 4388784.

The previous prime is 6400259. The next prime is 6400349. The reversal of 6400345 is 5430046.

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

It is a cyclic number.

It is not a de Polignac number, because 6400345 - 2¹¹ = 6398297 is a prime.

It is a super-2 number, since 2×6400345² = 81928832238050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6400349) 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, 91399 + ... + 91468.

It is an arithmetic number, because the mean of its divisors is an integer number (1097208).

Almost surely, 2^6400345 is an apocalyptic number.

It is an amenable number.

6400345 is a deficient number, since it is larger than the sum of its proper divisors (2377319).

6400345 is a wasteful number, since it uses less digits than its factorization.

6400345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182879.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 6400345 is about 2529.8903138279. The cubic root of 6400345 is about 185.6668894265. Note that the first 3 decimals are identical.

Subtracting from 6400345 its reverse (5430046), we obtain a cube (970299 = 99³).

The spelling of 6400345 in words is "six million, four hundred thousand, three hundred forty-five".