71072816 has 20 divisors (see below), whose sum is σ = 140039400. Its totient is φ = 34933632.

The previous prime is 71072797. The next prime is 71072821. The reversal of 71072816 is 61827017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36701 + ... + 38588.

It is an arithmetic number, because the mean of its divisors is an integer number (7001970).

Almost surely, 2^71072816 is an apocalyptic number.

It is an amenable number.

71072816 is a deficient number, since it is larger than the sum of its proper divisors (68966584).

71072816 is a wasteful number, since it uses less digits than its factorization.

71072816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75356 (or 75350 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 71072816 is about 8430.4695005676. The cubic root of 71072816 is about 414.2232842227.

The spelling of 71072816 in words is "seventy-one million, seventy-two thousand, eight hundred sixteen".