6400718 has 4 divisors (see below), whose sum is σ = 9601080. Its totient is φ = 3200358.

The previous prime is 6400717. The next prime is 6400753. The reversal of 6400718 is 8170046.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600178 + ... + 1600181.

It is an arithmetic number, because the mean of its divisors is an integer number (2400270).

Almost surely, 2^6400718 is an apocalyptic number.

6400718 is a deficient number, since it is larger than the sum of its proper divisors (3200362).

6400718 is a wasteful number, since it uses less digits than its factorization.

6400718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200361.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 6400718 is about 2529.9640313649. The cubic root of 6400718 is about 185.6704961282.

The spelling of 6400718 in words is "six million, four hundred thousand, seven hundred eighteen".