8309423520 has 576 divisors, whose sum is σ = 31437020160. Its totient is φ = 1990656000.

The previous prime is 8309423483. The next prime is 8309423531. The reversal of 8309423520 is 253249038.

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 95 ways as a sum of consecutive naturals, for example, 82271470 + ... + 82271570.

It is an arithmetic number, because the mean of its divisors is an integer number (54578160).

Almost surely, 2^8309423520 is an apocalyptic number.

8309423520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8309423520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15718510080).

8309423520 is an abundant number, since it is smaller than the sum of its proper divisors (23127596640).

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

8309423520 is a wasteful number, since it uses less digits than its factorization.

8309423520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 8309423520 is about 91156.0394049676. The cubic root of 8309423520 is about 2025.4598169349.

The spelling of 8309423520 in words is "eight billion, three hundred nine million, four hundred twenty-three thousand, five hundred twenty".