71990764 has 12 divisors (see below), whose sum is σ = 126060424. Its totient is φ = 35973504.

The previous prime is 71990761. The next prime is 71990771. The reversal of 71990764 is 46709917.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 71990764.

It is not an unprimeable number, because it can be changed into a prime (71990761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3607 + ... + 12529.

Almost surely, 2^71990764 is an apocalyptic number.

It is an amenable number.

71990764 is a deficient number, since it is larger than the sum of its proper divisors (54069660).

71990764 is a wasteful number, since it uses less digits than its factorization.

71990764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944 (or 10942 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 71990764 is about 8484.7371202648. The cubic root of 71990764 is about 415.9989752810.

The spelling of 71990764 in words is "seventy-one million, nine hundred ninety thousand, seven hundred sixty-four".