71149864 has 32 divisors (see below), whose sum is σ = 137855520. Its totient is φ = 34405056.

The previous prime is 71149861. The next prime is 71149877. The reversal of 71149864 is 46894117.

It is not an unprimeable number, because it can be changed into a prime (71149861) 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, 35842 + ... + 37774.

It is an arithmetic number, because the mean of its divisors is an integer number (4307985).

Almost surely, 2^71149864 is an apocalyptic number.

It is an amenable number.

71149864 is a deficient number, since it is larger than the sum of its proper divisors (66705656).

71149864 is a wasteful number, since it uses less digits than its factorization.

71149864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089 (or 2085 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 71149864 is about 8435.0378778047. The cubic root of 71149864 is about 414.3729126911.

The spelling of 71149864 in words is "seventy-one million, one hundred forty-nine thousand, eight hundred sixty-four".