8721707400 has 576 divisors, whose sum is σ = 35877703680. Its totient is φ = 1926892800.

The previous prime is 8721707381. The next prime is 8721707417. The reversal of 8721707400 is 47071278.

8721707400 is a `hidden beast` number, since 87 + 2 + 170 + 7 + 400 = 666.

It is a super-3 number, since 3×8721707400³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10545787 + ... + 10546613.

It is an arithmetic number, because the mean of its divisors is an integer number (62287680).

Almost surely, 2^8721707400 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 8721707400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17938851840).

8721707400 is an abundant number, since it is smaller than the sum of its proper divisors (27155996280).

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

8721707400 is a wasteful number, since it uses less digits than its factorization.

8721707400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 8721707400 is about 93390.0819145160. The cubic root of 8721707400 is about 2058.4192636609.

Adding to 8721707400 its reverse (47071278), we get a palindrome (8768778678).

The spelling of 8721707400 in words is "eight billion, seven hundred twenty-one million, seven hundred seven thousand, four hundred".