772340778 has 32 divisors (see below), whose sum is σ = 1872342720. Its totient is φ = 234042480.

The previous prime is 772340771. The next prime is 772340783. The reversal of 772340778 is 877043277.

It is not an unprimeable number, because it can be changed into a prime (772340771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649525 + ... + 650712.

It is an arithmetic number, because the mean of its divisors is an integer number (58510710).

Almost surely, 2^772340778 is an apocalyptic number.

772340778 is an abundant number, since it is smaller than the sum of its proper divisors (1100001942).

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

772340778 is a wasteful number, since it uses less digits than its factorization.

772340778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300259 (or 1300253 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 45.

The square root of 772340778 is about 27791.0197365984. The cubic root of 772340778 is about 917.4934836582.

The spelling of 772340778 in words is "seven hundred seventy-two million, three hundred forty thousand, seven hundred seventy-eight".