71960640 has 56 divisors (see below), whose sum is σ = 228478080. Its totient is φ = 19189248.

The previous prime is 71960639. The next prime is 71960719. The reversal of 71960640 is 4606917.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36520 + ... + 38439.

Almost surely, 2^71960640 is an apocalyptic number.

It is an amenable number.

71960640 is an abundant number, since it is smaller than the sum of its proper divisors (156517440).

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

71960640 is a wasteful number, since it uses less digits than its factorization.

71960640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74979 (or 74969 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 71960640 is about 8482.9617469372. The cubic root of 71960640 is about 415.9409432930.

The spelling of 71960640 in words is "seventy-one million, nine hundred sixty thousand, six hundred forty".