71697980 has 24 divisors (see below), whose sum is σ = 153120240. Its totient is φ = 28192640.

The previous prime is 71697931. The next prime is 71698013. The reversal of 71697980 is 8979617.

It is a congruent 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, 29201 + ... + 31560.

It is an arithmetic number, because the mean of its divisors is an integer number (6380010).

Almost surely, 2^71697980 is an apocalyptic number.

It is an amenable number.

71697980 is an abundant number, since it is smaller than the sum of its proper divisors (81422260).

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

71697980 is a wasteful number, since it uses less digits than its factorization.

71697980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60829 (or 60827 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 71697980 is about 8467.4659727689. The cubic root of 71697980 is about 415.4342577757.

The spelling of 71697980 in words is "seventy-one million, six hundred ninety-seven thousand, nine hundred eighty".