8621618 has 16 divisors (see below), whose sum is σ = 13920984. Its totient is φ = 3989760.

The previous prime is 8621617. The next prime is 8621623. The reversal of 8621618 is 8161268.

It can be written as a sum of positive squares in 4 ways, for example, as 6115729 + 2505889 = 2473^2 + 1583^2 .

It is not an unprimeable number, because it can be changed into a prime (8621617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5 + ... + 4152.

Almost surely, 2^8621618 is an apocalyptic number.

8621618 is a deficient number, since it is larger than the sum of its proper divisors (5299366).

8621618 is a wasteful number, since it uses less digits than its factorization.

8621618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237.

The product of its digits is 4608, while the sum is 32.

The square root of 8621618 is about 2936.2591847451. The cubic root of 8621618 is about 205.0514881577.

The spelling of 8621618 in words is "eight million, six hundred twenty-one thousand, six hundred eighteen".