71865740 has 24 divisors (see below), whose sum is σ = 152258400. Its totient is φ = 28491008.

The previous prime is 71865713. The next prime is 71865841. The reversal of 71865740 is 4756817.

It is a junction number, because it is equal to n+sod(n) for n = 71865694 and 71865703.

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, 13640 + ... + 18159.

It is an arithmetic number, because the mean of its divisors is an integer number (6344100).

Almost surely, 2^71865740 is an apocalyptic number.

It is an amenable number.

71865740 is an abundant number, since it is smaller than the sum of its proper divisors (80392660).

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

71865740 is a wasteful number, since it uses less digits than its factorization.

71865740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31921 (or 31919 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 71865740 is about 8477.3663363099. The cubic root of 71865740 is about 415.7580184785.

The spelling of 71865740 in words is "seventy-one million, eight hundred sixty-five thousand, seven hundred forty".