11618871 has 32 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 6535680.

The previous prime is 11618843. The next prime is 11618881. The reversal of 11618871 is 17881611.

11618871 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11618871 - 2⁵ = 11618839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11618801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77905 + ... + 78053.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^11618871 is an apocalyptic number.

11618871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11618871 is a deficient number, since it is larger than the sum of its proper divisors (6525129).

11618871 is a wasteful number, since it uses less digits than its factorization.

11618871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319.

The product of its digits is 2688, while the sum is 33.

The square root of 11618871 is about 3408.6465055796. The cubic root of 11618871 is about 226.4929265026.

The spelling of 11618871 in words is "eleven million, six hundred eighteen thousand, eight hundred seventy-one".