65439320 has 16 divisors (see below), whose sum is σ = 147238560. Its totient is φ = 26175712.

The previous prime is 65439313. The next prime is 65439331. The reversal of 65439320 is 2393456.

65439320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817952 + ... + 818031.

It is an arithmetic number, because the mean of its divisors is an integer number (9202410).

Almost surely, 2^65439320 is an apocalyptic number.

It is an amenable number.

65439320 is an abundant number, since it is smaller than the sum of its proper divisors (81799240).

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

65439320 is a wasteful number, since it uses less digits than its factorization.

65439320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635994 (or 1635990 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 65439320 is about 8089.4573365585. The cubic root of 65439320 is about 402.9763812875.

The spelling of 65439320 in words is "sixty-five million, four hundred thirty-nine thousand, three hundred twenty".