771880538 has 48 divisors (see below), whose sum is σ = 1389729768. Its totient is φ = 319334400.

The previous prime is 771880537. The next prime is 771880579. The reversal of 771880538 is 835088177.

771880538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 641760889 + 130119649 = 25333^2 + 11407^2 .

It is a junction number, because it is equal to n+sod(n) for n = 771880492 and 771880501.

It is not an unprimeable number, because it can be changed into a prime (771880537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227978 + ... + 231338.

Almost surely, 2^771880538 is an apocalyptic number.

771880538 is a deficient number, since it is larger than the sum of its proper divisors (617849230).

771880538 is a wasteful number, since it uses less digits than its factorization.

771880538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471 (or 3460 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 47.

The square root of 771880538 is about 27782.7381299972. The cubic root of 771880538 is about 917.3112018134.

The spelling of 771880538 in words is "seven hundred seventy-one million, eight hundred eighty thousand, five hundred thirty-eight".