64438 has 16 divisors (see below), whose sum is σ = 110160. Its totient is φ = 28000.

The previous prime is 64433. The next prime is 64439. The reversal of 64438 is 83446.

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 (64433) by changing a digit.

64438 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, 588 + ... + 688.

It is an arithmetic number, because the mean of its divisors is an integer number (6885).

2⁶⁴⁴³⁸ is an apocalyptic number.

64438 is a deficient number, since it is larger than the sum of its proper divisors (45722).

64438 is a wasteful number, since it uses less digits than its factorization.

64438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143.

The product of its digits is 2304, while the sum is 25.

The square root of 64438 is about 253.8464102563. The cubic root of 64438 is about 40.0910426238.

It can be divided in two parts, 6 and 4438, that added together give a palindrome (4444).

The spelling of 64438 in words is "sixty-four thousand, four hundred thirty-eight".