9828937881 has 27 divisors (see below), whose sum is σ = 16518789183. Its totient is φ = 5615346240.

The previous prime is 9828937879. The next prime is 9828937949. The reversal of 9828937881 is 1887398289.

The square root of 9828937881 is 99141.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5313097881 + 4515840000 = 72891^2 + 67200^2 .

It is not a de Polignac number, because 9828937881 - 2¹ = 9828937879 is a prime.

It is a super-2 number, since 2×9828937881² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (9828937801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2079601 + ... + 2084321.

Almost surely, 2^9828937881 is an apocalyptic number.

9828937881 is the 99141-st square number.

9828937881 is the 49571-st centered octagonal number.

It is an amenable number.

9828937881 is a deficient number, since it is larger than the sum of its proper divisors (6689851302).

9828937881 is an frugal number, since it uses more digits than its factorization.

9828937881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9462 (or 4731 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The cubic root of 9828937881 is about 2142.0792294159.

The spelling of 9828937881 in words is "nine billion, eight hundred twenty-eight million, nine hundred thirty-seven thousand, eight hundred eighty-one".