11778849 has 24 divisors (see below), whose sum is σ = 17631432. Its totient is φ = 7572480.

The previous prime is 11778847. The next prime is 11778859. The reversal of 11778849 is 94887711.

It can be written as a sum of positive squares in 4 ways, for example, as 225 + 11778624 = 15^2 + 3432^2 .

It is not a de Polignac number, because 11778849 - 2¹ = 11778847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11778847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50437 + ... + 50669.

It is an arithmetic number, because the mean of its divisors is an integer number (734643).

Almost surely, 2^11778849 is an apocalyptic number.

It is an amenable number.

11778849 is a deficient number, since it is larger than the sum of its proper divisors (5852583).

11778849 is a wasteful number, since it uses less digits than its factorization.

11778849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 414 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 11778849 is about 3432.0327795637. The cubic root of 11778849 is about 227.5277042299.

The spelling of 11778849 in words is "eleven million, seven hundred seventy-eight thousand, eight hundred forty-nine".