9923764984 has 24 divisors (see below), whose sum is σ = 21644947440. Its totient is φ = 4253041968.

The previous prime is 9923764979. The next prime is 9923764987. The reversal of 9923764984 is 4894673299.

It is a super-2 number, since 2×9923764984² (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 (9923764987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12657472 + ... + 12658255.

It is an arithmetic number, because the mean of its divisors is an integer number (901872810).

Almost surely, 2^9923764984 is an apocalyptic number.

It is an amenable number.

9923764984 is an abundant number, since it is smaller than the sum of its proper divisors (11721182456).

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

9923764984 is a wasteful number, since it uses less digits than its factorization.

9923764984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25315747 (or 25315736 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 61.

The square root of 9923764984 is about 99618.0956653961. The cubic root of 9923764984 is about 2148.9459397111.

The spelling of 9923764984 in words is "nine billion, nine hundred twenty-three million, seven hundred sixty-four thousand, nine hundred eighty-four".