65380320 has 72 divisors (see below), whose sum is σ = 223115256. Its totient is φ = 17434368.

The previous prime is 65380291. The next prime is 65380327. The reversal of 65380320 is 2308356.

65380320 is a `hidden beast` number, since 653 + 8 + 0 + 3 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65380327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21262 + ... + 24141.

It is an arithmetic number, because the mean of its divisors is an integer number (3098823).

Almost surely, 2^65380320 is an apocalyptic number.

65380320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65380320 is an abundant number, since it is smaller than the sum of its proper divisors (157734936).

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

65380320 is a wasteful number, since it uses less digits than its factorization.

65380320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45424 (or 45413 counting only the distinct ones).

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

The square root of 65380320 is about 8085.8097924698. The cubic root of 65380320 is about 402.8552372240.

Adding to 65380320 its reverse (2308356), we get a palindrome (67688676).

The spelling of 65380320 in words is "sixty-five million, three hundred eighty thousand, three hundred twenty".