778862560 has 96 divisors (see below), whose sum is σ = 2142770112. Its totient is φ = 261980160.

The previous prime is 778862551. The next prime is 778862587. The reversal of 778862560 is 65268877.

It is a congruent number.

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, 52800 + ... + 65920.

It is an arithmetic number, because the mean of its divisors is an integer number (22320522).

Almost surely, 2^778862560 is an apocalyptic number.

778862560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778862560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071385056).

778862560 is an abundant number, since it is smaller than the sum of its proper divisors (1363907552).

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

778862560 is a wasteful number, since it uses less digits than its factorization.

778862560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13196 (or 13188 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 778862560 is about 27908.1092157817. The cubic root of 778862560 is about 920.0687409254.

The spelling of 778862560 in words is "seven hundred seventy-eight million, eight hundred sixty-two thousand, five hundred sixty".