28632543 has 4 divisors (see below), whose sum is σ = 38176728. Its totient is φ = 19088360.

The previous prime is 28632533. The next prime is 28632559. The reversal of 28632543 is 34523682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28632543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28632503) 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 3 ways as a sum of consecutive naturals, for example, 4772088 + ... + 4772093.

It is an arithmetic number, because the mean of its divisors is an integer number (9544182).

Almost surely, 2^28632543 is an apocalyptic number.

28632543 is a deficient number, since it is larger than the sum of its proper divisors (9544185).

28632543 is an equidigital number, since it uses as much as digits as its factorization.

28632543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9544184.

The product of its digits is 34560, while the sum is 33.

The square root of 28632543 is about 5350.9385158120. The cubic root of 28632543 is about 305.9285257476.

The spelling of 28632543 in words is "twenty-eight million, six hundred thirty-two thousand, five hundred forty-three".