772839804340 has 24 divisors (see below), whose sum is σ = 1627314713640. Its totient is φ = 308307136128.

The previous prime is 772839804281. The next prime is 772839804349. The reversal of 772839804340 is 43408938277.

It can be written as a sum of positive squares in 4 ways, for example, as 1242703504 + 771597100836 = 35252^2 + 878406^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772839804349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51791455 + ... + 51806374.

It is an arithmetic number, because the mean of its divisors is an integer number (67804779735).

Almost surely, 2^772839804340 is an apocalyptic number.

It is an amenable number.

772839804340 is an abundant number, since it is smaller than the sum of its proper divisors (854474909300).

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

772839804340 is a wasteful number, since it uses less digits than its factorization.

772839804340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103598211 (or 103598209 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 772839804340 in words is "seven hundred seventy-two billion, eight hundred thirty-nine million, eight hundred four thousand, three hundred forty".