9870872 has 32 divisors (see below), whose sum is σ = 20321280. Its totient is φ = 4457760.

The previous prime is 9870871. The next prime is 9870907. The reversal of 9870872 is 2780789.

It is a super-2 number, since 2×9870872² = 194868228080768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9870871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19373 + ... + 19875.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^9870872 is an apocalyptic number.

It is an amenable number.

9870872 is an abundant number, since it is smaller than the sum of its proper divisors (10450408).

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

9870872 is a wasteful number, since it uses less digits than its factorization.

9870872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 9870872 is about 3141.7943917449. The cubic root of 9870872 is about 214.5121225193.

The spelling of 9870872 in words is "nine million, eight hundred seventy thousand, eight hundred seventy-two".