28550687 has 4 divisors (see below), whose sum is σ = 31146216. Its totient is φ = 25955160.

The previous prime is 28550677. The next prime is 28550699. The reversal of 28550687 is 78605582.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28550687 - 2¹⁰ = 28549663 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 (28550617) 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, 1297748 + ... + 1297769.

It is an arithmetic number, because the mean of its divisors is an integer number (7786554).

Almost surely, 2^28550687 is an apocalyptic number.

28550687 is a deficient number, since it is larger than the sum of its proper divisors (2595529).

28550687 is a wasteful number, since it uses less digits than its factorization.

28550687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595528.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 28550687 is about 5343.2842896481. The cubic root of 28550687 is about 305.6367134184.

The spelling of 28550687 in words is "twenty-eight million, five hundred fifty thousand, six hundred eighty-seven".