11638198 has 16 divisors (see below), whose sum is σ = 20509776. Its totient is φ = 4883040.

The previous prime is 11638181. The next prime is 11638199. The reversal of 11638198 is 89183611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20061 + ... + 20632.

It is an arithmetic number, because the mean of its divisors is an integer number (1281861).

Almost surely, 2^11638198 is an apocalyptic number.

11638198 is a deficient number, since it is larger than the sum of its proper divisors (8871578).

11638198 is a wasteful number, since it uses less digits than its factorization.

11638198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40719.

The product of its digits is 10368, while the sum is 37.

The square root of 11638198 is about 3411.4803238477. The cubic root of 11638198 is about 226.6184408167.

It can be divided in two parts, 11638 and 198, that multiplied together give a square (2304324 = 1518²).

The spelling of 11638198 in words is "eleven million, six hundred thirty-eight thousand, one hundred ninety-eight".