8709453720 has 320 divisors, whose sum is σ = 32968995840. Its totient is φ = 2043014400.

The previous prime is 8709453713. The next prime is 8709453733. The reversal of 8709453720 is 273549078.

8709453720 is a `hidden beast` number, since 8 + 7 + 0 + 94 + 537 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1100899 + ... + 1108781.

It is an arithmetic number, because the mean of its divisors is an integer number (103028112).

Almost surely, 2^8709453720 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 8709453720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16484497920).

8709453720 is an abundant number, since it is smaller than the sum of its proper divisors (24259542120).

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

8709453720 is a wasteful number, since it uses less digits than its factorization.

8709453720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7948 (or 7935 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 8709453720 is about 93324.4540300129. The cubic root of 8709453720 is about 2057.4548105786.

The spelling of 8709453720 in words is "eight billion, seven hundred nine million, four hundred fifty-three thousand, seven hundred twenty".