6439498930 has 8 divisors (see below), whose sum is σ = 11591098092. Its totient is φ = 2575799568.

The previous prime is 6439498903. The next prime is 6439498979. The reversal of 6439498930 is 398949346.

It can be written as a sum of positive squares in 2 ways, for example, as 6409763721 + 29735209 = 80061^2 + 5453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6439498930² = 82934292938942289800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321974937 + ... + 321974956.

Almost surely, 2^6439498930 is an apocalyptic number.

6439498930 is a deficient number, since it is larger than the sum of its proper divisors (5151599162).

6439498930 is a wasteful number, since it uses less digits than its factorization.

6439498930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643949900.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The square root of 6439498930 is about 80246.4885836134. The cubic root of 6439498930 is about 1860.4472399294.

The spelling of 6439498930 in words is "six billion, four hundred thirty-nine million, four hundred ninety-eight thousand, nine hundred thirty".