11491680 has 96 divisors (see below), whose sum is σ = 36741600. Its totient is φ = 3018752.

The previous prime is 11491661. The next prime is 11491709. The reversal of 11491680 is 8619411.

11491680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 42586 + ... + 42854.

It is an arithmetic number, because the mean of its divisors is an integer number (382725).

Almost surely, 2^11491680 is an apocalyptic number.

11491680 is a gapful number since it is divisible by the number (10) 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 11491680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18370800).

11491680 is an abundant number, since it is smaller than the sum of its proper divisors (25249920).

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

11491680 is a wasteful number, since it uses less digits than its factorization.

11491680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 11491680 is about 3389.9380525313. The cubic root of 11491680 is about 225.6634246500.

The spelling of 11491680 in words is "eleven million, four hundred ninety-one thousand, six hundred eighty".