772818920 has 64 divisors (see below), whose sum is σ = 1837468800. Its totient is φ = 291720960.

The previous prime is 772818877. The next prime is 772818923. The reversal of 772818920 is 29818277.

It is not an unprimeable number, because it can be changed into a prime (772818923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208685 + ... + 212355.

It is an arithmetic number, because the mean of its divisors is an integer number (28710450).

Almost surely, 2^772818920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 772818920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918734400).

772818920 is an abundant number, since it is smaller than the sum of its proper divisors (1064649880).

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

772818920 is a wasteful number, since it uses less digits than its factorization.

772818920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978 (or 3974 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 772818920 is about 27799.6208607240. The cubic root of 772818920 is about 917.6827790591.

The spelling of 772818920 in words is "seven hundred seventy-two million, eight hundred eighteen thousand, nine hundred twenty".