76771920 has 40 divisors (see below), whose sum is σ = 237993696. Its totient is φ = 20472448.

The previous prime is 76771889. The next prime is 76771939. The reversal of 76771920 is 2917767.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159702 + ... + 160181.

Almost surely, 2^76771920 is an apocalyptic number.

It is an amenable number.

76771920 is an abundant number, since it is smaller than the sum of its proper divisors (161221776).

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

76771920 is a wasteful number, since it uses less digits than its factorization.

76771920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319899 (or 319893 counting only the distinct ones).

The product of its (nonzero) digits is 37044, while the sum is 39.

The square root of 76771920 is about 8761.9586851343. The cubic root of 76771920 is about 425.0116167528.

The spelling of 76771920 in words is "seventy-six million, seven hundred seventy-one thousand, nine hundred twenty".