65321340 has 192 divisors, whose sum is σ = 224501760. Its totient is φ = 13870080.

The previous prime is 65321339. The next prime is 65321353. The reversal of 65321340 is 4312356.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65321340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 377494 + ... + 377666.

It is an arithmetic number, because the mean of its divisors is an integer number (1169280).

Almost surely, 2^65321340 is an apocalyptic number.

65321340 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 65321340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112250880).

65321340 is an abundant number, since it is smaller than the sum of its proper divisors (159180420).

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

65321340 is a wasteful number, since it uses less digits than its factorization.

65321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 65321340 is about 8082.1618395080. The cubic root of 65321340 is about 402.7340613600.

Adding to 65321340 its reverse (4312356), we get a palindrome (69633696).

The spelling of 65321340 in words is "sixty-five million, three hundred twenty-one thousand, three hundred forty".