7838139628 has 24 divisors (see below), whose sum is σ = 14969223360. Its totient is φ = 3561480720.

The previous prime is 7838139613. The next prime is 7838139649. The reversal of 7838139628 is 8269318387.

It is a super-2 number, since 2×7838139628² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93763 + ... + 156421.

It is an arithmetic number, because the mean of its divisors is an integer number (623717640).

Almost surely, 2^7838139628 is an apocalyptic number.

It is an amenable number.

7838139628 is a deficient number, since it is larger than the sum of its proper divisors (7131083732).

7838139628 is a wasteful number, since it uses less digits than its factorization.

7838139628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65517 (or 65515 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 7838139628 is about 88533.2684814020. The cubic root of 7838139628 is about 1986.4196311728.

The spelling of 7838139628 in words is "seven billion, eight hundred thirty-eight million, one hundred thirty-nine thousand, six hundred twenty-eight".