28351143 has 24 divisors (see below), whose sum is σ = 42538496. Its totient is φ = 18176400.

The previous prime is 28351109. The next prime is 28351159. The reversal of 28351143 is 34115382.

It is a happy number.

It is not a de Polignac number, because 28351143 - 2¹² = 28347047 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28351163) 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 23 ways as a sum of consecutive naturals, for example, 85488 + ... + 85818.

Almost surely, 2^28351143 is an apocalyptic number.

28351143 is a deficient number, since it is larger than the sum of its proper divisors (14187353).

28351143 is a wasteful number, since it uses less digits than its factorization.

28351143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 672 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 28351143 is about 5324.5791382982. The cubic root of 28351143 is about 304.9230048414.

The spelling of 28351143 in words is "twenty-eight million, three hundred fifty-one thousand, one hundred forty-three".