768780064 has 24 divisors (see below), whose sum is σ = 1629962460. Its totient is φ = 354821376.

The previous prime is 768780029. The next prime is 768780073. The reversal of 768780064 is 460087867.

It can be written as a sum of positive squares in 2 ways, for example, as 706496400 + 62283664 = 26580^2 + 7892^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 768779996 and 768780023.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923599 + ... + 924430.

Almost surely, 2^768780064 is an apocalyptic number.

It is an amenable number.

768780064 is an abundant number, since it is smaller than the sum of its proper divisors (861182396).

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

768780064 is a wasteful number, since it uses less digits than its factorization.

768780064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848052 (or 1848044 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 768780064 is about 27726.8834166410. The cubic root of 768780064 is about 916.0813413398.

The spelling of 768780064 in words is "seven hundred sixty-eight million, seven hundred eighty thousand, sixty-four".