28501849 has 4 divisors (see below), whose sum is σ = 28537060. Its totient is φ = 28466640.

The previous prime is 28501841. The next prime is 28501871. The reversal of 28501849 is 94810582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8761600 + 19740249 = 2960^2 + 4443^2 .

It is a cyclic number.

It is not a de Polignac number, because 28501849 - 2³ = 28501841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28501841) 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, 16362 + ... + 18019.

It is an arithmetic number, because the mean of its divisors is an integer number (7134265).

Almost surely, 2^28501849 is an apocalyptic number.

It is an amenable number.

28501849 is a deficient number, since it is larger than the sum of its proper divisors (35211).

28501849 is an equidigital number, since it uses as much as digits as its factorization.

28501849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35210.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28501849 is about 5338.7122979235. The cubic root of 28501849 is about 305.4623427752.

The spelling of 28501849 in words is "twenty-eight million, five hundred one thousand, eight hundred forty-nine".