65438 has 4 divisors (see below), whose sum is σ = 98160. Its totient is φ = 32718.

The previous prime is 65437. The next prime is 65447. The reversal of 65438 is 83456.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65437) by changing a digit.

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 as a sum of consecutive naturals, namely, 16358 + ... + 16361.

It is an arithmetic number, because the mean of its divisors is an integer number (24540).

2⁶⁵⁴³⁸ is an apocalyptic number.

65438 is a deficient number, since it is larger than the sum of its proper divisors (32722).

65438 is a wasteful number, since it uses less digits than its factorization.

65438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32721.

The product of its digits is 2880, while the sum is 26.

The square root of 65438 is about 255.8085221411. The cubic root of 65438 is about 40.2973671742.

The spelling of 65438 in words is "sixty-five thousand, four hundred thirty-eight".