786856813428 has 24 divisors (see below), whose sum is σ = 2098284836032. Its totient is φ = 224816232384.

The previous prime is 786856813397. The next prime is 786856813433. The reversal of 786856813428 is 824318658687.

It is a super-2 number, since 2×786856813428² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4683671425 + ... + 4683671592.

Almost surely, 2^786856813428 is an apocalyptic number.

It is an amenable number.

786856813428 is an abundant number, since it is smaller than the sum of its proper divisors (1311428022604).

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

786856813428 is a wasteful number, since it uses less digits than its factorization.

786856813428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367343031 (or 9367343029 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 66.

The spelling of 786856813428 in words is "seven hundred eighty-six billion, eight hundred fifty-six million, eight hundred thirteen thousand, four hundred twenty-eight".