28134887 has 8 divisors (see below), whose sum is σ = 31683072. Its totient is φ = 24751800.

The previous prime is 28134859. The next prime is 28134893. The reversal of 28134887 is 78843182.

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 28134887 - 2¹⁰ = 28133863 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 (28134287) 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, 40913 + ... + 41594.

It is an arithmetic number, because the mean of its divisors is an integer number (3960384).

Almost surely, 2^28134887 is an apocalyptic number.

28134887 is a deficient number, since it is larger than the sum of its proper divisors (3548185).

28134887 is a wasteful number, since it uses less digits than its factorization.

28134887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82549.

The product of its digits is 86016, while the sum is 41.

The square root of 28134887 is about 5304.2329322910. The cubic root of 28134887 is about 304.1457310000.

The spelling of 28134887 in words is "twenty-eight million, one hundred thirty-four thousand, eight hundred eighty-seven".