65020320 has 240 divisors, whose sum is σ = 238752360. Its totient is φ = 16644096.

The previous prime is 65020271. The next prime is 65020339. The reversal of 65020320 is 2302056.

It can be written as a sum of positive squares in 4 ways, for example, as 62157456 + 2862864 = 7884^2 + 1692^2 .

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 65020293 and 65020302.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 375754 + ... + 375926.

Almost surely, 2^65020320 is an apocalyptic number.

65020320 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 65020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119376180).

65020320 is an abundant number, since it is smaller than the sum of its proper divisors (173732040).

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

65020320 is a wasteful number, since it uses less digits than its factorization.

65020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 65020320 is about 8063.5178427284. The cubic root of 65020320 is about 402.1144695180.

Adding to 65020320 its reverse (2302056), we get a palindrome (67322376).

The spelling of 65020320 in words is "sixty-five million, twenty thousand, three hundred twenty".