2638198 has 8 divisors (see below), whose sum is σ = 3968640. Its totient is φ = 1315320.

The previous prime is 2638187. The next prime is 2638199. The reversal of 2638198 is 8918362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918 + ... + 2473.

It is an arithmetic number, because the mean of its divisors is an integer number (496080).

2^2638198 is an apocalyptic number.

2638198 is a deficient number, since it is larger than the sum of its proper divisors (1330442).

2638198 is a wasteful number, since it uses less digits than its factorization.

2638198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782.

The product of its digits is 20736, while the sum is 37.

The square root of 2638198 is about 1624.2530591013. The cubic root of 2638198 is about 138.1770115270.

The spelling of 2638198 in words is "two million, six hundred thirty-eight thousand, one hundred ninety-eight".