28218035 has 4 divisors (see below), whose sum is σ = 33861648. Its totient is φ = 22574424.

The previous prime is 28218017. The next prime is 28218053. The reversal of 28218035 is 53081282.

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

It is an interprime number because it is at equal distance from previous prime (28218017) and next prime (28218053).

It is a cyclic number.

It is not a de Polignac number, because 28218035 - 2⁶ = 28217971 is a prime.

It is a super-2 number, since 2×28218035² = 1592514998522450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28217989 and 28218007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2821799 + ... + 2821808.

It is an arithmetic number, because the mean of its divisors is an integer number (8465412).

Almost surely, 2^28218035 is an apocalyptic number.

28218035 is a deficient number, since it is larger than the sum of its proper divisors (5643613).

28218035 is an equidigital number, since it uses as much as digits as its factorization.

28218035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643612.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 28218035 is about 5312.0650410175. The cubic root of 28218035 is about 304.4450537764.

The spelling of 28218035 in words is "twenty-eight million, two hundred eighteen thousand, thirty-five".