6438077338 has 64 divisors (see below), whose sum is σ = 12591728640. Its totient is φ = 2393899200.

The previous prime is 6438077333. The next prime is 6438077381. The reversal of 6438077338 is 8337708346.

It is a junction number, because it is equal to n+sod(n) for n = 6438077291 and 6438077300.

It is not an unprimeable number, because it can be changed into a prime (6438077333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1801093 + ... + 1804663.

It is an arithmetic number, because the mean of its divisors is an integer number (196745760).

Almost surely, 2^6438077338 is an apocalyptic number.

6438077338 is a deficient number, since it is larger than the sum of its proper divisors (6153651302).

6438077338 is a wasteful number, since it uses less digits than its factorization.

6438077338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The square root of 6438077338 is about 80237.6304360990. The cubic root of 6438077338 is about 1860.3103249516.

The spelling of 6438077338 in words is "six billion, four hundred thirty-eight million, seventy-seven thousand, three hundred thirty-eight".