71640308 has 12 divisors (see below), whose sum is σ = 130821600. Its totient is φ = 34262712.

The previous prime is 71640301. The next prime is 71640313. The reversal of 71640308 is 80304617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71640301) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 389258 + ... + 389441.

It is an arithmetic number, because the mean of its divisors is an integer number (10901800).

Almost surely, 2^71640308 is an apocalyptic number.

It is an amenable number.

71640308 is a deficient number, since it is larger than the sum of its proper divisors (59181292).

71640308 is a wasteful number, since it uses less digits than its factorization.

71640308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778726 (or 778724 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 71640308 is about 8464.0597823976. The cubic root of 71640308 is about 415.3228397070.

The spelling of 71640308 in words is "seventy-one million, six hundred forty thousand, three hundred eight".