216028459 has 4 divisors (see below), whose sum is σ = 221867104. Its totient is φ = 210189816.

The previous prime is 216028457. The next prime is 216028471. The reversal of 216028459 is 954820612.

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

It is a cyclic number.

It is not a de Polignac number, because 216028459 - 2¹ = 216028457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 5838607 = 216028459 / (2 + 1 + 6 + 0 + 2 + 8 + 4 + 5 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216028457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2919267 + ... + 2919340.

It is an arithmetic number, because the mean of its divisors is an integer number (55466776).

Almost surely, 2^216028459 is an apocalyptic number.

216028459 is a deficient number, since it is larger than the sum of its proper divisors (5838645).

216028459 is an equidigital number, since it uses as much as digits as its factorization.

216028459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838644.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 216028459 is about 14697.9066196517. The cubic root of 216028459 is about 600.0263497687.

The spelling of 216028459 in words is "two hundred sixteen million, twenty-eight thousand, four hundred fifty-nine".