6396407 has 4 divisors (see below), whose sum is σ = 6733080. Its totient is φ = 6059736.

The previous prime is 6396389. The next prime is 6396409. The reversal of 6396407 is 7046936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6396407 - 2⁸ = 6396151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168308 + ... + 168345.

It is an arithmetic number, because the mean of its divisors is an integer number (1683270).

Almost surely, 2^6396407 is an apocalyptic number.

6396407 is a deficient number, since it is larger than the sum of its proper divisors (336673).

6396407 is a wasteful number, since it uses less digits than its factorization.

6396407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336672.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 6396407 is about 2529.1118994619. Note that the first 3 decimals coincide. The cubic root of 6396407 is about 185.6288026142.

The spelling of 6396407 in words is "six million, three hundred ninety-six thousand, four hundred seven".