778386340 has 24 divisors (see below), whose sum is σ = 1638161280. Its totient is φ = 310678368.

The previous prime is 778386307. The next prime is 778386341. The reversal of 778386340 is 43683877.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (778386341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32770 + ... + 51289.

It is an arithmetic number, because the mean of its divisors is an integer number (68256720).

Almost surely, 2^778386340 is an apocalyptic number.

It is an amenable number.

778386340 is an abundant number, since it is smaller than the sum of its proper divisors (859774940).

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

778386340 is a wasteful number, since it uses less digits than its factorization.

778386340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84531 (or 84529 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 778386340 is about 27899.5759824410. The cubic root of 778386340 is about 919.8811834585.

The spelling of 778386340 in words is "seven hundred seventy-eight million, three hundred eighty-six thousand, three hundred forty".