28216059 has 4 divisors (see below), whose sum is σ = 37621416. Its totient is φ = 18810704.

The previous prime is 28216049. The next prime is 28216079. The reversal of 28216059 is 95061282.

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 28216059 - 2¹⁵ = 28183291 is a prime.

It is a super-2 number, since 2×28216059² = 1592291970982962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28216049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4702674 + ... + 4702679.

It is an arithmetic number, because the mean of its divisors is an integer number (9405354).

Almost surely, 2^28216059 is an apocalyptic number.

28216059 is a deficient number, since it is larger than the sum of its proper divisors (9405357).

28216059 is an equidigital number, since it uses as much as digits as its factorization.

28216059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9405356.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 28216059 is about 5311.8790460627. The cubic root of 28216059 is about 304.4379472401.

The spelling of 28216059 in words is "twenty-eight million, two hundred sixteen thousand, fifty-nine".