65308320 has 576 divisors, whose sum is σ = 301916160. Its totient is φ = 12441600.

The previous prime is 65308307. The next prime is 65308343. The reversal of 65308320 is 2380356.

65308320 is a `hidden beast` number, since 653 + 0 + 8 + 3 + 2 + 0 = 666.

It is a super-2 number, since 2×65308320² = 8530353322444800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2106705 + ... + 2106735.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^65308320 is an apocalyptic number.

65308320 is a gapful number since it is divisible by the number (60) 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 65308320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150958080).

65308320 is an abundant number, since it is smaller than the sum of its proper divisors (236607840).

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

65308320 is a wasteful number, since it uses less digits than its factorization.

65308320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 65308320 is about 8081.3563218064. The cubic root of 65308320 is about 402.7073016217.

Adding to 65308320 its reverse (2380356), we get a palindrome (67688676).

The spelling of 65308320 in words is "sixty-five million, three hundred eight thousand, three hundred twenty".