778397160 has 64 divisors (see below), whose sum is σ = 2343545280. Its totient is φ = 206830080.

The previous prime is 778397159. The next prime is 778397189. The reversal of 778397160 is 61793877.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22500 + ... + 45420.

It is an arithmetic number, because the mean of its divisors is an integer number (36617895).

Almost surely, 2^778397160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778397160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1171772640).

778397160 is an abundant number, since it is smaller than the sum of its proper divisors (1565148120).

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

778397160 is a wasteful number, since it uses less digits than its factorization.

778397160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23218 (or 23214 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 48.

The square root of 778397160 is about 27899.7698915242. The cubic root of 778397160 is about 919.8854457242.

The spelling of 778397160 in words is "seven hundred seventy-eight million, three hundred ninety-seven thousand, one hundred sixty".