778107842 has 16 divisors (see below), whose sum is σ = 1198074240. Its totient is φ = 378834288.

The previous prime is 778107797. The next prime is 778107853. The reversal of 778107842 is 248701877.

It is a junction number, because it is equal to n+sod(n) for n = 778107793 and 778107802.

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, 2492 + ... + 39527.

It is an arithmetic number, because the mean of its divisors is an integer number (74879640).

Almost surely, 2^778107842 is an apocalyptic number.

778107842 is a deficient number, since it is larger than the sum of its proper divisors (419966398).

778107842 is a wasteful number, since it uses less digits than its factorization.

778107842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42265.

The product of its (nonzero) digits is 175616, while the sum is 44.

The square root of 778107842 is about 27894.5844564855. The cubic root of 778107842 is about 919.7714626099.

The spelling of 778107842 in words is "seven hundred seventy-eight million, one hundred seven thousand, eight hundred forty-two".