11197638 has 12 divisors (see below), whose sum is σ = 24261588. Its totient is φ = 3732540.

The previous prime is 11197621. The next prime is 11197649. The reversal of 11197638 is 83679111.

11197638 is a `hidden beast` number, since 1 + 1 + 19 + 7 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 311028 + ... + 311063.

It is an arithmetic number, because the mean of its divisors is an integer number (2021799).

Almost surely, 2^11197638 is an apocalyptic number.

11197638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11197638 is an abundant number, since it is smaller than the sum of its proper divisors (13063950).

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

11197638 is a wasteful number, since it uses less digits than its factorization.

11197638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622099 (or 622096 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 11197638 is about 3346.2871962819. The cubic root of 11197638 is about 223.7220590767.

The spelling of 11197638 in words is "eleven million, one hundred ninety-seven thousand, six hundred thirty-eight".