9719872 has 28 divisors (see below), whose sum is σ = 19956780. Its totient is φ = 4691456.

The previous prime is 9719867. The next prime is 9719873. The reversal of 9719872 is 2789179.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6843456 + 2876416 = 2616^2 + 1696^2 .

It is not an unprimeable number, because it can be changed into a prime (9719873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763 + ... + 4474.

Almost surely, 2^9719872 is an apocalyptic number.

It is an amenable number.

9719872 is an abundant number, since it is smaller than the sum of its proper divisors (10236908).

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

9719872 is a wasteful number, since it uses less digits than its factorization.

9719872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278 (or 5268 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 9719872 is about 3117.6709255468. The cubic root of 9719872 is about 213.4126614703.

The spelling of 9719872 in words is "nine million, seven hundred nineteen thousand, eight hundred seventy-two".