264438 has 32 divisors (see below), whose sum is σ = 604800. Its totient is φ = 85608.

The previous prime is 264437. The next prime is 264443. The reversal of 264438 is 834462.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 264438.

It is not an unprimeable number, because it can be changed into a prime (264437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3145 + ... + 3227.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2²⁶⁴⁴³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302400).

264438 is an abundant number, since it is smaller than the sum of its proper divisors (340362).

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

264438 is a wasteful number, since it uses less digits than its factorization.

264438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 147 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 264438 is about 514.2353546772. The cubic root of 264438 is about 64.1861442716.

The spelling of 264438 in words is "two hundred sixty-four thousand, four hundred thirty-eight".