438190489 has 15 divisors (see below), whose sum is σ = 484808815. Its totient is φ = 396052360.

The previous prime is 438190477. The next prime is 438190499. The reversal of 438190489 is 984091834.

The square root of 438190489 is 20933.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 398601225 + 39589264 = 19965^2 + 6292^2 .

It is a de Polignac number, because none of the positive numbers 2^k-438190489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438190409) 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 in 14 ways as a sum of consecutive naturals, for example, 2532807 + ... + 2532979.

Almost surely, 2^438190489 is an apocalyptic number.

438190489 is the 20933-rd square number.

438190489 is the 10467-th centered octagonal number.

It is an amenable number.

438190489 is a deficient number, since it is larger than the sum of its proper divisors (46618326).

438190489 is an frugal number, since it uses more digits than its factorization.

438190489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The cubic root of 438190489 is about 759.5464104329.

The spelling of 438190489 in words is "four hundred thirty-eight million, one hundred ninety thousand, four hundred eighty-nine".