28897141 has 16 divisors (see below), whose sum is σ = 35795200. Its totient is φ = 22851504.

The previous prime is 28897139. The next prime is 28897163. The reversal of 28897141 is 14179882.

28897141 = T₇₅₁ + T₇₅₂ + ... + T₈₄₁.

It is a happy number.

It is not a de Polignac number, because 28897141 - 2¹ = 28897139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28897094 and 28897103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14440 + ... + 16318.

It is an arithmetic number, because the mean of its divisors is an integer number (2237200).

Almost surely, 2^28897141 is an apocalyptic number.

It is an amenable number.

28897141 is a deficient number, since it is larger than the sum of its proper divisors (6898059).

28897141 is an equidigital number, since it uses as much as digits as its factorization.

28897141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1899 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 28897141 is about 5375.6061053615. The cubic root of 28897141 is about 306.8680161371.

The spelling of 28897141 in words is "twenty-eight million, eight hundred ninety-seven thousand, one hundred forty-one".