778420745 has 8 divisors (see below), whose sum is σ = 934390080. Its totient is φ = 622546480.

The previous prime is 778420703. The next prime is 778420759. The reversal of 778420745 is 547024877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 778420745 - 2¹⁶ = 778355209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 778420696 and 778420705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4301 + ... + 39690.

It is an arithmetic number, because the mean of its divisors is an integer number (116798760).

Almost surely, 2^778420745 is an apocalyptic number.

It is an amenable number.

778420745 is a deficient number, since it is larger than the sum of its proper divisors (155969335).

778420745 is a wasteful number, since it uses less digits than its factorization.

778420745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47535.

The product of its (nonzero) digits is 439040, while the sum is 44.

The square root of 778420745 is about 27900.1925620595. The cubic root of 778420745 is about 919.8947363024.

The spelling of 778420745 in words is "seven hundred seventy-eight million, four hundred twenty thousand, seven hundred forty-five".