778760260 has 12 divisors (see below), whose sum is σ = 1635396588. Its totient is φ = 311504096.

The previous prime is 778760183. The next prime is 778760261. The reversal of 778760260 is 62067877.

It can be written as a sum of positive squares in 2 ways, for example, as 404492544 + 374267716 = 20112^2 + 19346^2 .

It is not an unprimeable number, because it can be changed into a prime (778760261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19468987 + ... + 19469026.

It is an arithmetic number, because the mean of its divisors is an integer number (136283049).

Almost surely, 2^778760260 is an apocalyptic number.

It is an amenable number.

778760260 is an abundant number, since it is smaller than the sum of its proper divisors (856636328).

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

778760260 is a wasteful number, since it uses less digits than its factorization.

778760260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38938022 (or 38938020 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 778760260 is about 27906.2763549708. The cubic root of 778760260 is about 920.0284569018.

The spelling of 778760260 in words is "seven hundred seventy-eight million, seven hundred sixty thousand, two hundred sixty".