6399430450 has 48 divisors (see below), whose sum is σ = 13640109120. Its totient is φ = 2188163520.

The previous prime is 6399430417. The next prime is 6399430487. The reversal of 6399430450 is 540349936.

It is a junction number, because it is equal to n+sod(n) for n = 6399430397 and 6399430406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106041 + ... + 155059.

It is an arithmetic number, because the mean of its divisors is an integer number (284168940).

Almost surely, 2^6399430450 is an apocalyptic number.

6399430450 is an abundant number, since it is smaller than the sum of its proper divisors (7240678670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6399430450 is a wasteful number, since it uses less digits than its factorization.

6399430450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49411 (or 49406 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 6399430450 is about 79996.4402333004. The cubic root of 6399430450 is about 1856.5804564588.

The spelling of 6399430450 in words is "six billion, three hundred ninety-nine million, four hundred thirty thousand, four hundred fifty".