11898820 has 24 divisors (see below), whose sum is σ = 26074944. Its totient is φ = 4552416.

The previous prime is 11898791. The next prime is 11898829. The reversal of 11898820 is 2889811.

It is a self number, because there is not a number n which added to its sum of digits gives 11898820.

It is not an unprimeable number, because it can be changed into a prime (11898829) 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, 12474 + ... + 13393.

It is an arithmetic number, because the mean of its divisors is an integer number (1086456).

Almost surely, 2^11898820 is an apocalyptic number.

11898820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11898820 is an abundant number, since it is smaller than the sum of its proper divisors (14176124).

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

11898820 is a wasteful number, since it uses less digits than its factorization.

11898820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25899 (or 25897 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 11898820 is about 3449.4666254365. The cubic root of 11898820 is about 228.2975749261.

Subtracting from 11898820 its reverse (2889811), we obtain a palindrome (9009009).

The spelling of 11898820 in words is "eleven million, eight hundred ninety-eight thousand, eight hundred twenty".