28657143 has 12 divisors (see below), whose sum is σ = 41489448. Its totient is φ = 19060560.

The previous prime is 28657141. The next prime is 28657151. The reversal of 28657143 is 34175682.

28657143 is a `hidden beast` number, since 2 + 86 + 571 + 4 + 3 = 666.

It is not a de Polignac number, because 28657143 - 2¹ = 28657141 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28657098 and 28657107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28657141) 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, 696 + ... + 7602.

It is an arithmetic number, because the mean of its divisors is an integer number (3457454).

Almost surely, 2^28657143 is an apocalyptic number.

28657143 is a deficient number, since it is larger than the sum of its proper divisors (12832305).

28657143 is a wasteful number, since it uses less digits than its factorization.

28657143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374 (or 7371 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28657143 is about 5353.2366844742. The cubic root of 28657143 is about 306.0161147479.

The spelling of 28657143 in words is "twenty-eight million, six hundred fifty-seven thousand, one hundred forty-three".