28918411618 has 8 divisors (see below), whose sum is σ = 43400298348. Its totient is φ = 14451645504.

The previous prime is 28918411609. The next prime is 28918411637. The reversal of 28918411618 is 81611481982.

It can be written as a sum of positive squares in 2 ways, for example, as 20464160809 + 8454250809 = 143053^2 + 91947^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3775371 + ... + 3783022.

Almost surely, 2^28918411618 is an apocalyptic number.

28918411618 is a deficient number, since it is larger than the sum of its proper divisors (14481886730).

28918411618 is a wasteful number, since it uses less digits than its factorization.

28918411618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7560308.

The product of its digits is 221184, while the sum is 49.

The spelling of 28918411618 in words is "twenty-eight billion, nine hundred eighteen million, four hundred eleven thousand, six hundred eighteen".