28618543 has 2 divisors, whose sum is σ = 28618544. Its totient is φ = 28618542.

The previous prime is 28618537. The next prime is 28618559. The reversal of 28618543 is 34581682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28618543 - 2¹⁷ = 28487471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28618523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14309271 + 14309272.

It is an arithmetic number, because the mean of its divisors is an integer number (14309272).

Almost surely, 2^28618543 is an apocalyptic number.

28618543 is a deficient number, since it is larger than the sum of its proper divisors (1).

28618543 is an equidigital number, since it uses as much as digits as its factorization.

28618543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 28618543 is about 5349.6301741335. The cubic root of 28618543 is about 305.8786559472.

It can be divided in two parts, 28618 and 543, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28618543 in words is "twenty-eight million, six hundred eighteen thousand, five hundred forty-three".