71747872 has 24 divisors (see below), whose sum is σ = 161433216. Its totient is φ = 30748992.

The previous prime is 71747867. The next prime is 71747899. The reversal of 71747872 is 27874717.

It is a nude number because it is divisible by every one of its digits.

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, 159928 + ... + 160375.

It is an arithmetic number, because the mean of its divisors is an integer number (6726384).

Almost surely, 2^71747872 is an apocalyptic number.

It is an amenable number.

71747872 is an abundant number, since it is smaller than the sum of its proper divisors (89685344).

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

71747872 is a wasteful number, since it uses less digits than its factorization.

71747872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320320 (or 320312 counting only the distinct ones).

The product of its digits is 153664, while the sum is 43.

The square root of 71747872 is about 8470.4115602490. The cubic root of 71747872 is about 415.5305972642.

The spelling of 71747872 in words is "seventy-one million, seven hundred forty-seven thousand, eight hundred seventy-two".