768639606 has 64 divisors (see below), whose sum is σ = 1876193280. Its totient is φ = 205188480.

The previous prime is 768639569. The next prime is 768639617. The reversal of 768639606 is 606936867.

It is a super-4 number, since 4×768639606⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27580 + ... + 47936.

It is an arithmetic number, because the mean of its divisors is an integer number (29315520).

Almost surely, 2^768639606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 768639606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938096640).

768639606 is an abundant number, since it is smaller than the sum of its proper divisors (1107553674).

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

768639606 is a wasteful number, since it uses less digits than its factorization.

768639606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20429.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The square root of 768639606 is about 27724.3504161955. The cubic root of 768639606 is about 916.0255478404.

The spelling of 768639606 in words is "seven hundred sixty-eight million, six hundred thirty-nine thousand, six hundred six".