8452779720 has 256 divisors, whose sum is σ = 31781376000. Its totient is φ = 1747215360.

The previous prime is 8452779691. The next prime is 8452779773. The reversal of 8452779720 is 279772548.

It is a Cunningham number, because it is equal to 91939²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1836462 + ... + 1841058.

It is an arithmetic number, because the mean of its divisors is an integer number (124146000).

Almost surely, 2^8452779720 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 8452779720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15890688000).

8452779720 is an abundant number, since it is smaller than the sum of its proper divisors (23328596280).

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

8452779720 is a wasteful number, since it uses less digits than its factorization.

8452779720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828 (or 4824 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The square root of 8452779720 is about 91938.9999945616. Note that the first 5 decimals coincide. The cubic root of 8452779720 is about 2037.0413762942.

The spelling of 8452779720 in words is "eight billion, four hundred fifty-two million, seven hundred seventy-nine thousand, seven hundred twenty".