868720786 has 8 divisors (see below), whose sum is σ = 1306331964. Its totient is φ = 433276800.

The previous prime is 868720777. The next prime is 868720799. The reversal of 868720786 is 687027868.

It can be written as a sum of positive squares in 2 ways, for example, as 669205161 + 199515625 = 25869^2 + 14125^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540795 + ... + 542398.

Almost surely, 2^868720786 is an apocalyptic number.

868720786 is a deficient number, since it is larger than the sum of its proper divisors (437611178).

868720786 is a wasteful number, since it uses less digits than its factorization.

868720786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083596.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The square root of 868720786 is about 29474.0697223848. The cubic root of 868720786 is about 954.1721528446.

The spelling of 868720786 in words is "eight hundred sixty-eight million, seven hundred twenty thousand, seven hundred eighty-six".