785686340 has 24 divisors (see below), whose sum is σ = 1655225880. Its totient is φ = 313267968.

The previous prime is 785686339. The next prime is 785686381. The reversal of 785686340 is 43686587.

It can be written as a sum of positive squares in 4 ways, for example, as 58736896 + 726949444 = 7664^2 + 26962^2 .

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, 56495 + ... + 69014.

It is an arithmetic number, because the mean of its divisors is an integer number (68967745).

Almost surely, 2^785686340 is an apocalyptic number.

It is an amenable number.

785686340 is an abundant number, since it is smaller than the sum of its proper divisors (869539540).

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

785686340 is a wasteful number, since it uses less digits than its factorization.

785686340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125831 (or 125829 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 785686340 is about 28030.0970387189. The cubic root of 785686340 is about 922.7479042815.

The spelling of 785686340 in words is "seven hundred eighty-five million, six hundred eighty-six thousand, three hundred forty".