65390512 has 40 divisors (see below), whose sum is σ = 139991040. Its totient is φ = 29340480.

The previous prime is 65390509. The next prime is 65390519. The reversal of 65390512 is 21509356.

It is not an unprimeable number, because it can be changed into a prime (65390519) 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, 11553 + ... + 16255.

It is an arithmetic number, because the mean of its divisors is an integer number (3499776).

Almost surely, 2^65390512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65390512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69995520).

65390512 is an abundant number, since it is smaller than the sum of its proper divisors (74600528).

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

65390512 is a wasteful number, since it uses less digits than its factorization.

65390512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801 (or 4795 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 65390512 is about 8086.4400078156. The cubic root of 65390512 is about 402.8761695537.

Adding to 65390512 its reverse (21509356), we get a palindrome (86899868).

The spelling of 65390512 in words is "sixty-five million, three hundred ninety thousand, five hundred twelve".