8661388 has 12 divisors (see below), whose sum is σ = 15178240. Its totient is φ = 4324752.

The previous prime is 8661383. The next prime is 8661407. The reversal of 8661388 is 8831668.

8661388 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8661388.

It is not an unprimeable number, because it can be changed into a prime (8661383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4270 + ... + 5962.

Almost surely, 2^8661388 is an apocalyptic number.

It is an amenable number.

8661388 is a deficient number, since it is larger than the sum of its proper divisors (6516852).

8661388 is a wasteful number, since it uses less digits than its factorization.

8661388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976 (or 2974 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 8661388 is about 2943.0236152637. The cubic root of 8661388 is about 205.3662933634.

The spelling of 8661388 in words is "eight million, six hundred sixty-one thousand, three hundred eighty-eight".