2638398 has 16 divisors (see below), whose sum is σ = 6030720. Its totient is φ = 753816.

The previous prime is 2638381. The next prime is 2638403. The reversal of 2638398 is 8938362.

It is a super-2 number, since 2×2638398² = 13922288012808, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31368 + ... + 31451.

It is an arithmetic number, because the mean of its divisors is an integer number (376920).

2^2638398 is an apocalyptic number.

2638398 is an abundant number, since it is smaller than the sum of its proper divisors (3392322).

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

2638398 is a wasteful number, since it uses less digits than its factorization.

2638398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62831.

The product of its digits is 62208, while the sum is 39.

The square root of 2638398 is about 1624.3146246956. The cubic root of 2638398 is about 138.1805031406.

The spelling of 2638398 in words is "two million, six hundred thirty-eight thousand, three hundred ninety-eight".