6399730 has 16 divisors (see below), whose sum is σ = 11715840. Its totient is φ = 2516272.

The previous prime is 6399719. The next prime is 6399737. The reversal of 6399730 is 379936.

It is a self number, because there is not a number n which added to its sum of digits gives 6399730.

It is not an unprimeable number, because it can be changed into a prime (6399737) 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, 4834 + ... + 6013.

It is an arithmetic number, because the mean of its divisors is an integer number (732240).

Almost surely, 2^6399730 is an apocalyptic number.

6399730 is a deficient number, since it is larger than the sum of its proper divisors (5316110).

6399730 is a wasteful number, since it uses less digits than its factorization.

6399730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10913.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 6399730 is about 2529.7687641364. The cubic root of 6399730 is about 185.6609424141.

The spelling of 6399730 in words is "six million, three hundred ninety-nine thousand, seven hundred thirty".