8388861 has 16 divisors (see below), whose sum is σ = 12680640. Its totient is φ = 4890240.

The previous prime is 8388857. The next prime is 8388881. The reversal of 8388861 is 1688838.

It is a happy number.

It is not a de Polignac number, because 8388861 - 2² = 8388857 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8388811) 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, 4920 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (792540).

Almost surely, 2^8388861 is an apocalyptic number.

It is an amenable number.

8388861 is a deficient number, since it is larger than the sum of its proper divisors (4291779).

8388861 is a wasteful number, since it uses less digits than its factorization.

8388861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11356.

The product of its digits is 73728, while the sum is 42.

The square root of 8388861 is about 2896.3530516841. The cubic root of 8388861 is about 203.1893773380.

The spelling of 8388861 in words is "eight million, three hundred eighty-eight thousand, eight hundred sixty-one".