28831886 has 8 divisors (see below), whose sum is σ = 43434144. Its totient is φ = 14353840.

The previous prime is 28831871. The next prime is 28831889. The reversal of 28831886 is 68813882.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28831889) 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, 30470 + ... + 31401.

It is an arithmetic number, because the mean of its divisors is an integer number (5429268).

Almost surely, 2^28831886 is an apocalyptic number.

28831886 is a deficient number, since it is larger than the sum of its proper divisors (14602258).

28831886 is a wasteful number, since it uses less digits than its factorization.

28831886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62106.

The product of its digits is 147456, while the sum is 44.

The square root of 28831886 is about 5369.5331268184. The cubic root of 28831886 is about 306.6368541172.

The spelling of 28831886 in words is "twenty-eight million, eight hundred thirty-one thousand, eight hundred eighty-six".