778290243 has 16 divisors (see below), whose sum is σ = 1099560096. Its totient is φ = 487984640.

The previous prime is 778290241. The next prime is 778290263. The reversal of 778290243 is 342092877.

It is a cyclic number.

It is not a de Polignac number, because 778290243 - 2¹ = 778290241 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 778290195 and 778290204.

It is not an unprimeable number, because it can be changed into a prime (778290241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77533 + ... + 86993.

It is an arithmetic number, because the mean of its divisors is an integer number (68722506).

Almost surely, 2^778290243 is an apocalyptic number.

778290243 is a deficient number, since it is larger than the sum of its proper divisors (321269853).

778290243 is a wasteful number, since it uses less digits than its factorization.

778290243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11094.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 778290243 is about 27897.8537346513. The cubic root of 778290243 is about 919.8433267389.

The spelling of 778290243 in words is "seven hundred seventy-eight million, two hundred ninety thousand, two hundred forty-three".