11491389 has 40 divisors (see below), whose sum is σ = 21141120. Its totient is φ = 6057504.

The previous prime is 11491373. The next prime is 11491397. The reversal of 11491389 is 98319411.

It is not a de Polignac number, because 11491389 - 2⁴ = 11491373 is a prime.

It is a super-2 number, since 2×11491389² = 264104042298642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11491339) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6592 + ... + 8150.

It is an arithmetic number, because the mean of its divisors is an integer number (528528).

Almost surely, 2^11491389 is an apocalyptic number.

It is an amenable number.

11491389 is a deficient number, since it is larger than the sum of its proper divisors (9649731).

11491389 is a wasteful number, since it uses less digits than its factorization.

11491389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1582 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 11491389 is about 3389.8951311213. The cubic root of 11491389 is about 225.6615198340.

The spelling of 11491389 in words is "eleven million, four hundred ninety-one thousand, three hundred eighty-nine".