11391072 has 192 divisors, whose sum is σ = 39481344. Its totient is φ = 2787840.

The previous prime is 11391067. The next prime is 11391073. The reversal of 11391072 is 27019311.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169983 + ... + 170049.

It is an arithmetic number, because the mean of its divisors is an integer number (205632).

Almost surely, 2^11391072 is an apocalyptic number.

11391072 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 11391072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19740672).

11391072 is an abundant number, since it is smaller than the sum of its proper divisors (28090272).

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

11391072 is a wasteful number, since it uses less digits than its factorization.

11391072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 11391072 is about 3375.0662215725. The cubic root of 11391072 is about 225.0029431714.

It can be divided in two parts, 1139 and 1072, that added together give a triangular number (2211 = T₆₆).

The spelling of 11391072 in words is "eleven million, three hundred ninety-one thousand, seventy-two".