11778481 has 16 divisors (see below), whose sum is σ = 14289408. Its totient is φ = 9561600.

The previous prime is 11778479. The next prime is 11778491. The reversal of 11778481 is 18487711.

It is a cyclic number.

It is not a de Polignac number, because 11778481 - 2¹ = 11778479 is a prime.

It is a super-2 number, since 2×11778481² = 277465229334722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11778481.

It is not an unprimeable number, because it can be changed into a prime (11778451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3105 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (893088).

Almost surely, 2^11778481 is an apocalyptic number.

11778481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11778481 is a deficient number, since it is larger than the sum of its proper divisors (2510927).

11778481 is a wasteful number, since it uses less digits than its factorization.

11778481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712.

The product of its digits is 12544, while the sum is 37.

The square root of 11778481 is about 3431.9791666034. The cubic root of 11778481 is about 227.5253346982.

The spelling of 11778481 in words is "eleven million, seven hundred seventy-eight thousand, four hundred eighty-one".