6399430418 has 16 divisors (see below), whose sum is σ = 9805812480. Its totient is φ = 3130860096.

The previous prime is 6399430417. The next prime is 6399430487. The reversal of 6399430418 is 8140349936.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (6399430417) 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, 622730 + ... + 632922.

It is an arithmetic number, because the mean of its divisors is an integer number (612863280).

Almost surely, 2^6399430418 is an apocalyptic number.

6399430418 is a deficient number, since it is larger than the sum of its proper divisors (3406382062).

6399430418 is a wasteful number, since it uses less digits than its factorization.

6399430418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16921.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 6399430418 is about 79996.4400332915. The cubic root of 6399430418 is about 1856.5804533642.

The spelling of 6399430418 in words is "six billion, three hundred ninety-nine million, four hundred thirty thousand, four hundred eighteen".