71157880 has 32 divisors (see below), whose sum is σ = 165628800. Its totient is φ = 27481216.

The previous prime is 71157829. The next prime is 71157881. The reversal of 71157880 is 8875117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71157881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29512 + ... + 31831.

It is an arithmetic number, because the mean of its divisors is an integer number (5175900).

Almost surely, 2^71157880 is an apocalyptic number.

It is an amenable number.

71157880 is an abundant number, since it is smaller than the sum of its proper divisors (94470920).

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

71157880 is a wasteful number, since it uses less digits than its factorization.

71157880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61383 (or 61379 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 71157880 is about 8435.5130252996. The cubic root of 71157880 is about 414.3884736884.

The spelling of 71157880 in words is "seventy-one million, one hundred fifty-seven thousand, eight hundred eighty".