438247 has 8 divisors (see below), whose sum is σ = 461312. Its totient is φ = 415800.

The previous prime is 438241. The next prime is 438253. The reversal of 438247 is 742834.

It is an interprime number because it is at equal distance from previous prime (438241) and next prime (438253).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1972 + ... + 2182.

It is an arithmetic number, because the mean of its divisors is an integer number (57664).

2⁴³⁸²⁴⁷ is an apocalyptic number.

438247 is a deficient number, since it is larger than the sum of its proper divisors (23065).

438247 is a wasteful number, since it uses less digits than its factorization.

438247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 5376, while the sum is 28.

The square root of 438247 is about 662.0022658571. The cubic root of 438247 is about 75.9579060527.

The spelling of 438247 in words is "four hundred thirty-eight thousand, two hundred forty-seven".