28851893 has 4 divisors (see below), whose sum is σ = 32973600. Its totient is φ = 24730188.

The previous prime is 28851883. The next prime is 28851919. The reversal of 28851893 is 39815882.

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 not a de Polignac number, because 28851893 - 2⁴ = 28851877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28851803) 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, 2060843 + ... + 2060856.

It is an arithmetic number, because the mean of its divisors is an integer number (8243400).

Almost surely, 2^28851893 is an apocalyptic number.

It is an amenable number.

28851893 is a deficient number, since it is larger than the sum of its proper divisors (4121707).

28851893 is an equidigital number, since it uses as much as digits as its factorization.

28851893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121706.

The product of its digits is 138240, while the sum is 44.

The square root of 28851893 is about 5371.3958148697. The cubic root of 28851893 is about 306.7077647871.

The spelling of 28851893 in words is "twenty-eight million, eight hundred fifty-one thousand, eight hundred ninety-three".