11489820 has 24 divisors (see below), whose sum is σ = 32171664. Its totient is φ = 3063936.

The previous prime is 11489789. The next prime is 11489827. The reversal of 11489820 is 2898411.

11489820 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11489827) 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, 95689 + ... + 95808.

It is an arithmetic number, because the mean of its divisors is an integer number (1340486).

Almost surely, 2^11489820 is an apocalyptic number.

11489820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11489820 is an abundant number, since it is smaller than the sum of its proper divisors (20681844).

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

11489820 is a wasteful number, since it uses less digits than its factorization.

11489820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191509 (or 191507 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 11489820 is about 3389.6637001331. The cubic root of 11489820 is about 225.6512489827.

The spelling of 11489820 in words is "eleven million, four hundred eighty-nine thousand, eight hundred twenty".