9928924839 has 24 divisors (see below), whose sum is σ = 14938560000. Its totient is φ = 6590086776.

The previous prime is 9928924813. The next prime is 9928924849. The reversal of 9928924839 is 9384298299.

It is not a de Polignac number, because 9928924839 - 2²⁹ = 9392053927 is a prime.

It is a super-2 number, since 2×9928924839² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928924849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34839 + ... + 145160.

It is an arithmetic number, because the mean of its divisors is an integer number (622440000).

Almost surely, 2^9928924839 is an apocalyptic number.

9928924839 is a deficient number, since it is larger than the sum of its proper divisors (5009635161).

9928924839 is a wasteful number, since it uses less digits than its factorization.

9928924839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180241 (or 180229 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 9928924839 is about 99643.9904811123. The cubic root of 9928924839 is about 2149.3183228489.

The spelling of 9928924839 in words is "nine billion, nine hundred twenty-eight million, nine hundred twenty-four thousand, eight hundred thirty-nine".