65390 has 16 divisors (see below), whose sum is σ = 127008. Its totient is φ = 24096.

The previous prime is 65381. The next prime is 65393. The reversal of 65390 is 9356.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65393) by changing a digit.

65390 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 122 + ... + 381.

It is an arithmetic number, because the mean of its divisors is an integer number (7938).

2⁶⁵³⁹⁰ is an apocalyptic number.

65390 is a deficient number, since it is larger than the sum of its proper divisors (61618).

65390 is a wasteful number, since it uses less digits than its factorization.

65390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 65390 is about 255.7146847563. The cubic root of 65390 is about 40.2875118060.

The spelling of 65390 in words is "sixty-five thousand, three hundred ninety".