64390 has 16 divisors (see below), whose sum is σ = 119232. Its totient is φ = 25024.

The previous prime is 64381. The next prime is 64399. The reversal of 64390 is 9346.

It is an interprime number because it is at equal distance from previous prime (64381) and next prime (64399).

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64399) by changing a digit.

64390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (7452).

2⁶⁴³⁹⁰ is an apocalyptic number.

64390 is a deficient number, since it is larger than the sum of its proper divisors (54842).

64390 is a wasteful number, since it uses less digits than its factorization.

64390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 64390 is about 253.7518472839. The cubic root of 64390 is about 40.0810855174.

It can be divided in two parts, 64 and 390, that added together give a palindrome (454).

The spelling of 64390 in words is "sixty-four thousand, three hundred ninety".