778418870 has 16 divisors (see below), whose sum is σ = 1449470160. Its totient is φ = 300630624.

The previous prime is 778418869. The next prime is 778418873. The reversal of 778418870 is 78814877.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778418873) 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, 1341812 + ... + 1342391.

It is an arithmetic number, because the mean of its divisors is an integer number (90591885).

Almost surely, 2^778418870 is an apocalyptic number.

778418870 is a deficient number, since it is larger than the sum of its proper divisors (671051290).

778418870 is a wasteful number, since it uses less digits than its factorization.

778418870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684239.

The product of its (nonzero) digits is 702464, while the sum is 50.

The square root of 778418870 is about 27900.1589601206. The cubic root of 778418870 is about 919.8939977113.

The spelling of 778418870 in words is "seven hundred seventy-eight million, four hundred eighteen thousand, eight hundred seventy".