28761543 has 12 divisors (see below), whose sum is σ = 42667768. Its totient is φ = 18655920.

The previous prime is 28761529. The next prime is 28761553. The reversal of 28761543 is 34516782.

It is not a de Polignac number, because 28761543 - 2¹⁰ = 28760519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28761498 and 28761507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761553) 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 11 ways as a sum of consecutive naturals, for example, 42853 + ... + 43518.

Almost surely, 2^28761543 is an apocalyptic number.

28761543 is a deficient number, since it is larger than the sum of its proper divisors (13906225).

28761543 is a wasteful number, since it uses less digits than its factorization.

28761543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86414 (or 86411 counting only the distinct ones).

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

The square root of 28761543 is about 5362.9789296621. The cubic root of 28761543 is about 306.3872771760.

The spelling of 28761543 in words is "twenty-eight million, seven hundred sixty-one thousand, five hundred forty-three".