798017778 has 32 divisors (see below), whose sum is σ = 1783192320. Its totient is φ = 264533040.

The previous prime is 798017711. The next prime is 798017797. The reversal of 798017778 is 877710897.

798017778 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 (54).

It is a Curzon 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, 31050 + ... + 50597.

It is an arithmetic number, because the mean of its divisors is an integer number (55724760).

Almost surely, 2^798017778 is an apocalyptic number.

798017778 is an abundant number, since it is smaller than the sum of its proper divisors (985174542).

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

798017778 is a wasteful number, since it uses less digits than its factorization.

798017778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81839 (or 81833 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 54.

The square root of 798017778 is about 28249.2084490876. The cubic root of 798017778 is about 927.5504109691.

The spelling of 798017778 in words is "seven hundred ninety-eight million, seventeen thousand, seven hundred seventy-eight".