28549143 has 12 divisors (see below), whose sum is σ = 47128848. Its totient is φ = 16313760.

The previous prime is 28549133. The next prime is 28549177. The reversal of 28549143 is 34194582.

It is not a de Polignac number, because 28549143 - 2⁴ = 28549127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28549098 and 28549107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226518 + ... + 226643.

It is an arithmetic number, because the mean of its divisors is an integer number (3927404).

Almost surely, 2^28549143 is an apocalyptic number.

28549143 is a deficient number, since it is larger than the sum of its proper divisors (18579705).

28549143 is a wasteful number, since it uses less digits than its factorization.

28549143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453174 (or 453171 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28549143 is about 5343.1398072669. The cubic root of 28549143 is about 305.6312037834.

The spelling of 28549143 in words is "twenty-eight million, five hundred forty-nine thousand, one hundred forty-three".