778861104 has 40 divisors (see below), whose sum is σ = 2299495680. Its totient is φ = 222531648.

The previous prime is 778861093. The next prime is 778861123. The reversal of 778861104 is 401168877.

It is a happy number.

778861104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 1158684 + ... + 1159355.

It is an arithmetic number, because the mean of its divisors is an integer number (57487392).

Almost surely, 2^778861104 is an apocalyptic number.

It is an amenable number.

778861104 is an abundant number, since it is smaller than the sum of its proper divisors (1520634576).

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

778861104 is a wasteful number, since it uses less digits than its factorization.

778861104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318057 (or 2318051 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 778861104 is about 27908.0831301614. The cubic root of 778861104 is about 920.0681676018.

The spelling of 778861104 in words is "seven hundred seventy-eight million, eight hundred sixty-one thousand, one hundred four".