438291 has 20 divisors (see below), whose sum is σ = 749232. Its totient is φ = 250128.

The previous prime is 438287. The next prime is 438301. The reversal of 438291 is 192834.

It is not a de Polignac number, because 438291 - 2² = 438287 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 438291.

It is not an unprimeable number, because it can be changed into a prime (438211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 181 + ... + 953.

2⁴³⁸²⁹¹ is an apocalyptic number.

438291 is a deficient number, since it is larger than the sum of its proper divisors (310941).

438291 is an equidigital number, since it uses as much as digits as its factorization.

438291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 783 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 438291 is about 662.0354975377. The cubic root of 438291 is about 75.9604480256.

It can be divided in two parts, 438 and 291, that added together give a 6-th power (729 = 3⁶).

The spelling of 438291 in words is "four hundred thirty-eight thousand, two hundred ninety-one".