28862861 has 4 divisors (see below), whose sum is σ = 30117792. Its totient is φ = 27607932.

The previous prime is 28862857. The next prime is 28862927. The reversal of 28862861 is 16826882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28862861 - 2² = 28862857 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 (28862831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627431 + ... + 627476.

It is an arithmetic number, because the mean of its divisors is an integer number (7529448).

Almost surely, 2^28862861 is an apocalyptic number.

It is an amenable number.

28862861 is a deficient number, since it is larger than the sum of its proper divisors (1254931).

28862861 is a wasteful number, since it uses less digits than its factorization.

28862861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254930.

The product of its digits is 73728, while the sum is 41.

The square root of 28862861 is about 5372.4166815317. The cubic root of 28862861 is about 306.7466246819.

The spelling of 28862861 in words is "twenty-eight million, eight hundred sixty-two thousand, eight hundred sixty-one".