11817648 has 30 divisors (see below), whose sum is σ = 33073404. Its totient is φ = 3939168.

The previous prime is 11817643. The next prime is 11817667. The reversal of 11817648 is 84671811.

11817648 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 7 + 648 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11817643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40890 + ... + 41177.

Almost surely, 2^11817648 is an apocalyptic number.

11817648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11817648 is an abundant number, since it is smaller than the sum of its proper divisors (21255756).

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

11817648 is a wasteful number, since it uses less digits than its factorization.

11817648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82081 (or 82072 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 11817648 is about 3437.6806134369. The cubic root of 11817648 is about 227.7772524455. Note that the first 3 decimals are identical.

It can be divided in two parts, 118 and 17648, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 11817648 in words is "eleven million, eight hundred seventeen thousand, six hundred forty-eight".