8490438 has 48 divisors (see below), whose sum is σ = 20279376. Its totient is φ = 2545920.

The previous prime is 8490421. The next prime is 8490439. The reversal of 8490438 is 8340948.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8490439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26970 + ... + 27282.

It is an arithmetic number, because the mean of its divisors is an integer number (422487).

Almost surely, 2^8490438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8490438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10139688).

8490438 is an abundant number, since it is smaller than the sum of its proper divisors (11788938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8490438 is a wasteful number, since it uses less digits than its factorization.

8490438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 8490438 is about 2913.8356165028. The cubic root of 8490438 is about 204.0061993502.

The spelling of 8490438 in words is "eight million, four hundred ninety thousand, four hundred thirty-eight".