11491378 has 4 divisors (see below), whose sum is σ = 17237070. Its totient is φ = 5745688.

The previous prime is 11491373. The next prime is 11491397. The reversal of 11491378 is 87319411.

11491378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87319411 = 79 ⋅1105309.

It can be written as a sum of positive squares in only one way, i.e., 6487209 + 5004169 = 2547^2 + 2237^2 .

It is not an unprimeable number, because it can be changed into a prime (11491373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2872843 + ... + 2872846.

Almost surely, 2^11491378 is an apocalyptic number.

11491378 is a deficient number, since it is larger than the sum of its proper divisors (5745692).

11491378 is an equidigital number, since it uses as much as digits as its factorization.

11491378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745691.

The product of its digits is 6048, while the sum is 34.

The square root of 11491378 is about 3389.8935086519. The cubic root of 11491378 is about 225.6614478300.

The spelling of 11491378 in words is "eleven million, four hundred ninety-one thousand, three hundred seventy-eight".