28841687 has 8 divisors (see below), whose sum is σ = 34025472. Its totient is φ = 23923800.

The previous prime is 28841671. The next prime is 28841711. The reversal of 28841687 is 78614882.

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 28841687 - 2⁴ = 28841671 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 (28841647) 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, 66239 + ... + 66672.

It is an arithmetic number, because the mean of its divisors is an integer number (4253184).

Almost surely, 2^28841687 is an apocalyptic number.

28841687 is a deficient number, since it is larger than the sum of its proper divisors (5183785).

28841687 is a wasteful number, since it uses less digits than its factorization.

28841687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132949.

The product of its digits is 172032, while the sum is 44.

The square root of 28841687 is about 5370.4456984500. The cubic root of 28841687 is about 306.6715958302.

The spelling of 28841687 in words is "twenty-eight million, eight hundred forty-one thousand, six hundred eighty-seven".