438490 has 16 divisors (see below), whose sum is σ = 850248. Its totient is φ = 161856.

The previous prime is 438479. The next prime is 438499. The reversal of 438490 is 94834.

It can be written as a sum of positive squares in 4 ways, for example, as 395641 + 42849 = 629^2 + 207^2 .

It is not an unprimeable number, because it can be changed into a prime (438499) 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, 1557 + ... + 1816.

2⁴³⁸⁴⁹⁰ is an apocalyptic number.

438490 is a deficient number, since it is larger than the sum of its proper divisors (411758).

438490 is a wasteful number, since it uses less digits than its factorization.

438490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 438490 is about 662.1857745376. The cubic root of 438490 is about 75.9719425517.

The spelling of 438490 in words is "four hundred thirty-eight thousand, four hundred ninety".