8979973632 has 420 divisors, whose sum is σ = 31357090116. Its totient is φ = 2560481280.

The previous prime is 8979973621. The next prime is 8979973727. The reversal of 8979973632 is 2363799798.

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 8979973632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 18288907 + ... + 18289397.

Almost surely, 2^8979973632 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 8979973632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15678545058).

8979973632 is an abundant number, since it is smaller than the sum of its proper divisors (22377116484).

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

8979973632 is an frugal number, since it uses more digits than its factorization.

8979973632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 503 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The square root of 8979973632 is about 94762.7227975220. The cubic root of 8979973632 is about 2078.5398430619.

The spelling of 8979973632 in words is "eight billion, nine hundred seventy-nine million, nine hundred seventy-three thousand, six hundred thirty-two".