9878397272 has 8 divisors (see below), whose sum is σ = 18521994900. Its totient is φ = 4939198632.

The previous prime is 9878397271. The next prime is 9878397289. The reversal of 9878397272 is 2727938789.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878397271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617399822 + ... + 617399837.

Almost surely, 2^9878397272 is an apocalyptic number.

It is an amenable number.

9878397272 is a deficient number, since it is larger than the sum of its proper divisors (8643597628).

9878397272 is a wasteful number, since it uses less digits than its factorization.

9878397272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234799665 (or 1234799661 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 62.

The square root of 9878397272 is about 99390.1266323773. The cubic root of 9878397272 is about 2145.6662131876. Note that the first 3 decimals are identical.

The spelling of 9878397272 in words is "nine billion, eight hundred seventy-eight million, three hundred ninety-seven thousand, two hundred seventy-two".