28845890 has 8 divisors (see below), whose sum is σ = 51922620. Its totient is φ = 11538352.

The previous prime is 28845881. The next prime is 28845893. The reversal of 28845890 is 9854882.

It can be written as a sum of positive squares in 2 ways, for example, as 27741289 + 1104601 = 5267^2 + 1051^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28845893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442285 + ... + 1442304.

Almost surely, 2^28845890 is an apocalyptic number.

28845890 is a deficient number, since it is larger than the sum of its proper divisors (23076730).

28845890 is a wasteful number, since it uses less digits than its factorization.

28845890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884596.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 28845890 is about 5370.8369924994. The cubic root of 28845890 is about 306.6864918395.

The spelling of 28845890 in words is "twenty-eight million, eight hundred forty-five thousand, eight hundred ninety".