71129864 has 32 divisors (see below), whose sum is σ = 144318720. Its totient is φ = 32671296.

The previous prime is 71129857. The next prime is 71129867. The reversal of 71129864 is 46892117.

It is not an unprimeable number, because it can be changed into a prime (71129867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21659 + ... + 24725.

It is an arithmetic number, because the mean of its divisors is an integer number (4509960).

Almost surely, 2^71129864 is an apocalyptic number.

It is an amenable number.

71129864 is an abundant number, since it is smaller than the sum of its proper divisors (73188856).

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

71129864 is a wasteful number, since it uses less digits than its factorization.

71129864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3305 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 71129864 is about 8433.8522633492. The cubic root of 71129864 is about 414.3340827509.

The spelling of 71129864 in words is "seventy-one million, one hundred twenty-nine thousand, eight hundred sixty-four".