438091091 has 8 divisors (see below), whose sum is σ = 449220240. Its totient is φ = 427097088.

The previous prime is 438091079. The next prime is 438091099. The reversal of 438091091 is 190190834.

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

It is a cyclic number.

It is not a de Polignac number, because 438091091 - 2¹⁸ = 437828947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438091099) 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, 27206 + ... + 40203.

It is an arithmetic number, because the mean of its divisors is an integer number (56152530).

Almost surely, 2^438091091 is an apocalyptic number.

438091091 is a deficient number, since it is larger than the sum of its proper divisors (11129149).

438091091 is an equidigital number, since it uses as much as digits as its factorization.

438091091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67573.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 438091091 is about 20930.6256714891. The cubic root of 438091091 is about 759.4889749071.

The spelling of 438091091 in words is "four hundred thirty-eight million, ninety-one thousand, ninety-one".