28652891 has 8 divisors (see below), whose sum is σ = 29425200. Its totient is φ = 27884160.

The previous prime is 28652887. The next prime is 28652941. The reversal of 28652891 is 19825682.

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 28652891 - 2² = 28652887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28652801) 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, 24815 + ... + 25943.

It is an arithmetic number, because the mean of its divisors is an integer number (3678150).

Almost surely, 2^28652891 is an apocalyptic number.

28652891 is a deficient number, since it is larger than the sum of its proper divisors (772309).

28652891 is a wasteful number, since it uses less digits than its factorization.

28652891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its digits is 69120, while the sum is 41.

The square root of 28652891 is about 5352.8395268306. The cubic root of 28652891 is about 306.0009789651. Note that the first 3 decimals are identical.

The spelling of 28652891 in words is "twenty-eight million, six hundred fifty-two thousand, eight hundred ninety-one".