778045906 has 16 divisors (see below), whose sum is σ = 1284437088. Its totient is φ = 350526400.

The previous prime is 778045871. The next prime is 778045907. The reversal of 778045906 is 609540877.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (778045907) 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, 154000 + ... + 158971.

It is an arithmetic number, because the mean of its divisors is an integer number (80277318).

Almost surely, 2^778045906 is an apocalyptic number.

778045906 is a deficient number, since it is larger than the sum of its proper divisors (506391182).

778045906 is a wasteful number, since it uses less digits than its factorization.

778045906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313097.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 778045906 is about 27893.4742547428. The cubic root of 778045906 is about 919.7470579049.

The spelling of 778045906 in words is "seven hundred seventy-eight million, forty-five thousand, nine hundred six".