11391012 has 72 divisors (see below), whose sum is σ = 30401280. Its totient is φ = 3591360.

The previous prime is 11391007. The next prime is 11391019. The reversal of 11391012 is 21019311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11391019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65758 + ... + 65930.

It is an arithmetic number, because the mean of its divisors is an integer number (422240).

Almost surely, 2^11391012 is an apocalyptic number.

11391012 is a gapful number since it is divisible by the number (12) 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 11391012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15200640).

11391012 is an abundant number, since it is smaller than the sum of its proper divisors (19010268).

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

11391012 is a wasteful number, since it uses less digits than its factorization.

11391012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 11391012 is about 3375.0573328464. The cubic root of 11391012 is about 225.0025481193.

It can be divided in two parts, 113 and 91012, that added together give a cube (91125 = 45³).

The spelling of 11391012 in words is "eleven million, three hundred ninety-one thousand, twelve".