28918011 has 8 divisors (see below), whose sum is σ = 38591824. Its totient is φ = 19261440.

The previous prime is 28917953. The next prime is 28918031. The reversal of 28918011 is 11081982.

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

It is not a de Polignac number, because 28918011 - 2⁷ = 28917883 is a prime.

It is a super-2 number, since 2×28918011² = 1672502720392242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28918011.

It is not an unprimeable number, because it can be changed into a prime (28918031) 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, 315 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (4823978).

Almost surely, 2^28918011 is an apocalyptic number.

28918011 is a deficient number, since it is larger than the sum of its proper divisors (9673813).

28918011 is a wasteful number, since it uses less digits than its factorization.

28918011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8621.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 28918011 is about 5377.5469314549. The cubic root of 28918011 is about 306.9418734360.

Adding to 28918011 its reverse (11081982), we get a palindrome (39999993).

The spelling of 28918011 in words is "twenty-eight million, nine hundred eighteen thousand, eleven".