28681829 has 8 divisors (see below), whose sum is σ = 31757088. Its totient is φ = 25684560.

The previous prime is 28681823. The next prime is 28681831. The reversal of 28681829 is 92818682.

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

It is not a de Polignac number, because 28681829 - 2⁴ = 28681813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28681829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28681823) 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, 18722 + ... + 20195.

It is an arithmetic number, because the mean of its divisors is an integer number (3969636).

Almost surely, 2^28681829 is an apocalyptic number.

It is an amenable number.

28681829 is a deficient number, since it is larger than the sum of its proper divisors (3075259).

28681829 is a wasteful number, since it uses less digits than its factorization.

28681829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38995.

The product of its digits is 110592, while the sum is 44.

The square root of 28681829 is about 5355.5418960176. The cubic root of 28681829 is about 306.1039595793.

The spelling of 28681829 in words is "twenty-eight million, six hundred eighty-one thousand, eight hundred twenty-nine".