778378268 has 24 divisors (see below), whose sum is σ = 1404256560. Its totient is φ = 377343360.

The previous prime is 778378267. The next prime is 778378291. The reversal of 778378268 is 862873877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778378267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5363 + ... + 39818.

It is an arithmetic number, because the mean of its divisors is an integer number (58510690).

Almost surely, 2^778378268 is an apocalyptic number.

It is an amenable number.

778378268 is a deficient number, since it is larger than the sum of its proper divisors (625878292).

778378268 is a wasteful number, since it uses less digits than its factorization.

778378268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45317 (or 45315 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 56.

The square root of 778378268 is about 27899.4313203692. The cubic root of 778378268 is about 919.8780036722.

The spelling of 778378268 in words is "seven hundred seventy-eight million, three hundred seventy-eight thousand, two hundred sixty-eight".