8065520 has 40 divisors (see below), whose sum is σ = 19217520. Its totient is φ = 3146240.

The previous prime is 8065517. The next prime is 8065523. The reversal of 8065520 is 255608.

It is an interprime number because it is at equal distance from previous prime (8065517) and next prime (8065523).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×8065520² = 130105225740800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8065520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8065523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051 + ... + 4509.

It is an arithmetic number, because the mean of its divisors is an integer number (480438).

Almost surely, 2^8065520 is an apocalyptic number.

8065520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

8065520 is the 1640-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8065520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9608760).

8065520 is an abundant number, since it is smaller than the sum of its proper divisors (11152000).

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

8065520 is a wasteful number, since it uses less digits than its factorization.

8065520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513 (or 2507 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 8065520 is about 2839.9859154580. The cubic root of 8065520 is about 200.5445161653.

The spelling of 8065520 in words is "eight million, sixty-five thousand, five hundred twenty".