778982670 has 192 divisors, whose sum is σ = 2257295040. Its totient is φ = 192595968.

The previous prime is 778982651. The next prime is 778982683. The reversal of 778982670 is 76289877.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4502704 + ... + 4502876.

It is an arithmetic number, because the mean of its divisors is an integer number (11756745).

Almost surely, 2^778982670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778982670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1128647520).

778982670 is an abundant number, since it is smaller than the sum of its proper divisors (1478312370).

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

778982670 is a wasteful number, since it uses less digits than its factorization.

778982670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The square root of 778982670 is about 27910.2610163359. The cubic root of 778982670 is about 920.1160337265.

The spelling of 778982670 in words is "seven hundred seventy-eight million, nine hundred eighty-two thousand, six hundred seventy".