9772787872 has 48 divisors (see below), whose sum is σ = 19654918920. Its totient is φ = 4781550592.

The previous prime is 9772787831. The next prime is 9772787881. The reversal of 9772787872 is 2787872779.

It can be written as a sum of positive squares in 4 ways, for example, as 7348604176 + 2424183696 = 85724^2 + 49236^2 .

It is a super-2 number, since 2×9772787872² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 652338 + ... + 667150.

Almost surely, 2^9772787872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9772787872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9827459460).

9772787872 is an abundant number, since it is smaller than the sum of its proper divisors (9882131048).

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

9772787872 is a wasteful number, since it uses less digits than its factorization.

9772787872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15265 (or 15257 counting only the distinct ones).

The product of its digits is 38723328, while the sum is 64.

The square root of 9772787872 is about 98857.4118212691. The cubic root of 9772787872 is about 2137.9924014171.

The spelling of 9772787872 in words is "nine billion, seven hundred seventy-two million, seven hundred eighty-seven thousand, eight hundred seventy-two".