8720618 has 8 divisors (see below), whose sum is σ = 13400100. Its totient is φ = 4253920.

The previous prime is 8720617. The next prime is 8720623. The reversal of 8720618 is 8160278.

It can be written as a sum of positive squares in 2 ways, for example, as 8254129 + 466489 = 2873^2 + 683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8720617) 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, 53093 + ... + 53256.

Almost surely, 2^8720618 is an apocalyptic number.

8720618 is a deficient number, since it is larger than the sum of its proper divisors (4679482).

8720618 is a wasteful number, since it uses less digits than its factorization.

8720618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106392.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 8720618 is about 2953.0692507965. The cubic root of 8720618 is about 205.8333556615.

The spelling of 8720618 in words is "eight million, seven hundred twenty thousand, six hundred eighteen".