298638438 has 96 divisors (see below), whose sum is σ = 724492800. Its totient is φ = 82026000.

The previous prime is 298638437. The next prime is 298638443. The reversal of 298638438 is 834836892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298638437) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1977663 + ... + 1977813.

It is an arithmetic number, because the mean of its divisors is an integer number (7546800).

Almost surely, 2^298638438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 298638438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362246400).

298638438 is an abundant number, since it is smaller than the sum of its proper divisors (425854362).

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

298638438 is a wasteful number, since it uses less digits than its factorization.

298638438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 194 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 298638438 is about 17281.1584681120. The cubic root of 298638438 is about 668.4186646656.

The spelling of 298638438 in words is "two hundred ninety-eight million, six hundred thirty-eight thousand, four hundred thirty-eight".