11989110 has 64 divisors (see below), whose sum is σ = 33795072. Its totient is φ = 2664576.

The previous prime is 11989099. The next prime is 11989121. The reversal of 11989110 is 1198911.

11989110 = 494² + 495² + ... + 538².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11989099) and next prime (11989121).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6999 + ... + 8541.

It is an arithmetic number, because the mean of its divisors is an integer number (528048).

Almost surely, 2^11989110 is an apocalyptic number.

11989110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11989110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16897536).

11989110 is an abundant number, since it is smaller than the sum of its proper divisors (21805962).

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

11989110 is a wasteful number, since it uses less digits than its factorization.

11989110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 11989110 is about 3462.5294222577. The cubic root of 11989110 is about 228.8735723387.

It can be divided in two parts, 11 and 989110, that added together give a triangular number (989121 = T₁₄₀₆).

The spelling of 11989110 in words is "eleven million, nine hundred eighty-nine thousand, one hundred ten".