11138998 has 16 divisors (see below), whose sum is σ = 18481680. Its totient is φ = 5001696.

The previous prime is 11138989. The next prime is 11138999. The reversal of 11138998 is 89983111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11138998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11138999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4828 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (1155105).

Almost surely, 2^11138998 is an apocalyptic number.

11138998 is a deficient number, since it is larger than the sum of its proper divisors (7342682).

11138998 is a wasteful number, since it uses less digits than its factorization.

11138998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11631.

The product of its digits is 15552, while the sum is 40.

The square root of 11138998 is about 3337.5137452900. The cubic root of 11138998 is about 223.3308447533.

The spelling of 11138998 in words is "eleven million, one hundred thirty-eight thousand, nine hundred ninety-eight".