28811087 has 8 divisors (see below), whose sum is σ = 30534000. Its totient is φ = 27108864.

The previous prime is 28811071. The next prime is 28811099. The reversal of 28811087 is 78011882.

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

It is a cyclic number.

It is not a de Polignac number, because 28811087 - 2⁴ = 28811071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811287) 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, 2258 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (3816750).

Almost surely, 2^28811087 is an apocalyptic number.

28811087 is a deficient number, since it is larger than the sum of its proper divisors (1722913).

28811087 is a wasteful number, since it uses less digits than its factorization.

28811087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10345.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 28811087 is about 5367.5960168403. The cubic root of 28811087 is about 306.5631015809.

The spelling of 28811087 in words is "twenty-eight million, eight hundred eleven thousand, eighty-seven".