778042818 has 48 divisors (see below), whose sum is σ = 2027987520. Its totient is φ = 210597408.

The previous prime is 778042807. The next prime is 778042823. The reversal of 778042818 is 818240877.

It is a super-2 number, since 2×778042818² = 1210701253282762248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160105 + ... + 164892.

It is an arithmetic number, because the mean of its divisors is an integer number (42249740).

Almost surely, 2^778042818 is an apocalyptic number.

778042818 is an abundant number, since it is smaller than the sum of its proper divisors (1249944702).

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

778042818 is a wasteful number, since it uses less digits than its factorization.

778042818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325031 (or 325028 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 778042818 is about 27893.4189012391. The cubic root of 778042818 is about 919.7458411033.

The spelling of 778042818 in words is "seven hundred seventy-eight million, forty-two thousand, eight hundred eighteen".