11138898 has 16 divisors (see below), whose sum is σ = 22508640. Its totient is φ = 3674496.

The previous prime is 11138891. The next prime is 11138903. The reversal of 11138898 is 89883111.

It is not an unprimeable number, because it can be changed into a prime (11138891) 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, 8988 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (1406790).

Almost surely, 2^11138898 is an apocalyptic number.

11138898 is an abundant number, since it is smaller than the sum of its proper divisors (11369742).

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

11138898 is a wasteful number, since it uses less digits than its factorization.

11138898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19241.

The product of its digits is 13824, while the sum is 39.

The square root of 11138898 is about 3337.4987640447. The cubic root of 11138898 is about 223.3301764362.

It can be divided in two parts, 1113 and 8898, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 11138898 in words is "eleven million, one hundred thirty-eight thousand, eight hundred ninety-eight".