7639399938 has 8 divisors (see below), whose sum is σ = 15278799888. Its totient is φ = 2546466644.

The previous prime is 7639399931. The next prime is 7639399949. The reversal of 7639399938 is 8399939367.

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

7639399938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (7639399931) 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 3 ways as a sum of consecutive naturals, for example, 636616656 + ... + 636616667.

It is an arithmetic number, because the mean of its divisors is an integer number (1909849986).

Almost surely, 2^7639399938 is an apocalyptic number.

7639399938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7639399938 is a wasteful number, since it uses less digits than its factorization.

7639399938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273233328.

The product of its digits is 59521392, while the sum is 66.

The square root of 7639399938 is about 87403.6608958687. The cubic root of 7639399938 is about 1969.4868356833.

The spelling of 7639399938 in words is "seven billion, six hundred thirty-nine million, three hundred ninety-nine thousand, nine hundred thirty-eight".