778794102 has 48 divisors (see below), whose sum is σ = 1752900240. Its totient is φ = 259150752.

The previous prime is 778794091. The next prime is 778794103. The reversal of 778794102 is 201497877.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778794103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 401928 + ... + 403860.

It is an arithmetic number, because the mean of its divisors is an integer number (36518755).

Almost surely, 2^778794102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778794102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876450120).

778794102 is an abundant number, since it is smaller than the sum of its proper divisors (974106138).

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

778794102 is a wasteful number, since it uses less digits than its factorization.

778794102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779 (or 2767 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 778794102 is about 27906.8826994346. The cubic root of 778794102 is about 920.0417837040.

The spelling of 778794102 in words is "seven hundred seventy-eight million, seven hundred ninety-four thousand, one hundred two".