11309868 has 60 divisors (see below), whose sum is σ = 30065112. Its totient is φ = 3706560.

The previous prime is 11309863. The next prime is 11309869. The reversal of 11309868 is 86890311.

It is a super-2 number, since 2×11309868² = 255826228354848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11309863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21448 + ... + 21968.

Almost surely, 2^11309868 is an apocalyptic number.

11309868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11309868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15032556).

11309868 is an abundant number, since it is smaller than the sum of its proper divisors (18755244).

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

11309868 is a wasteful number, since it uses less digits than its factorization.

11309868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11309868 is about 3363.0147189687. The cubic root of 11309868 is about 224.4670050699.

The spelling of 11309868 in words is "eleven million, three hundred nine thousand, eight hundred sixty-eight".