7838379639 has 20 divisors (see below), whose sum is σ = 11713737024. Its totient is φ = 5223554784.

The previous prime is 7838379617. The next prime is 7838379641. The reversal of 7838379639 is 9369738387.

It is not a de Polignac number, because 7838379639 - 2⁸ = 7838379383 is a prime.

It is a super-2 number, since 2×7838379639² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7838379539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 207514 + ... + 242360.

Almost surely, 2^7838379639 is an apocalyptic number.

7838379639 is a deficient number, since it is larger than the sum of its proper divisors (3875357385).

7838379639 is a wasteful number, since it uses less digits than its factorization.

7838379639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37636 (or 37627 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The square root of 7838379639 is about 88534.6239558287. The cubic root of 7838379639 is about 1986.4399062942.

The spelling of 7838379639 in words is "seven billion, eight hundred thirty-eight million, three hundred seventy-nine thousand, six hundred thirty-nine".