778470258 has 32 divisors (see below), whose sum is σ = 1614605760. Its totient is φ = 249923520.

The previous prime is 778470241. The next prime is 778470293. The reversal of 778470258 is 852074877.

It is a happy number.

778470258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 67941 + ... + 78567.

It is an arithmetic number, because the mean of its divisors is an integer number (50456430).

Almost surely, 2^778470258 is an apocalyptic number.

778470258 is an abundant number, since it is smaller than the sum of its proper divisors (836135502).

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

778470258 is a wasteful number, since it uses less digits than its factorization.

778470258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11082.

The product of its (nonzero) digits is 878080, while the sum is 48.

The square root of 778470258 is about 27901.0798715749. The cubic root of 778470258 is about 919.9142398005.

The spelling of 778470258 in words is "seven hundred seventy-eight million, four hundred seventy thousand, two hundred fifty-eight".