4398138 has 40 divisors (see below), whose sum is σ = 10441332. Its totient is φ = 1378944.

The previous prime is 4398133. The next prime is 4398143. The reversal of 4398138 is 8318934.

It is an interprime number because it is at equal distance from previous prime (4398133) and next prime (4398143).

It can be written as a sum of positive squares in 2 ways, for example, as 4397409 + 729 = 2097^2 + 27^2 .

It is not an unprimeable number, because it can be changed into a prime (4398131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1956 + ... + 3552.

Almost surely, 2^4398138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4398138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5220666).

4398138 is an abundant number, since it is smaller than the sum of its proper divisors (6043194).

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

4398138 is a wasteful number, since it uses less digits than its factorization.

4398138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628 (or 1619 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 4398138 is about 2097.1738125392. The cubic root of 4398138 is about 163.8411360678.

The spelling of 4398138 in words is "four million, three hundred ninety-eight thousand, one hundred thirty-eight".