778045902 has 32 divisors (see below), whose sum is σ = 1651946400. Its totient is φ = 243452928.

The previous prime is 778045871. The next prime is 778045907. The reversal of 778045902 is 209540877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778045907) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29874 + ... + 49482.

It is an arithmetic number, because the mean of its divisors is an integer number (51623325).

Almost surely, 2^778045902 is an apocalyptic number.

778045902 is an abundant number, since it is smaller than the sum of its proper divisors (873900498).

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

778045902 is a wasteful number, since it uses less digits than its factorization.

778045902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20020.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 778045902 is about 27893.4741830415. The cubic root of 778045902 is about 919.7470563288.

The spelling of 778045902 in words is "seven hundred seventy-eight million, forty-five thousand, nine hundred two".