220028087 has 4 divisors (see below), whose sum is σ = 220092600. Its totient is φ = 219963576.

The previous prime is 220028047. The next prime is 220028101. The reversal of 220028087 is 780820022.

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 220028087 - 2⁸ = 220027831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220028027) 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, 26837 + ... + 34062.

It is an arithmetic number, because the mean of its divisors is an integer number (55023150).

Almost surely, 2^220028087 is an apocalyptic number.

220028087 is a deficient number, since it is larger than the sum of its proper divisors (64513).

220028087 is an equidigital number, since it uses as much as digits as its factorization.

220028087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64512.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 220028087 is about 14833.3437565506. The cubic root of 220028087 is about 603.7067628749.

The spelling of 220028087 in words is "two hundred twenty million, twenty-eight thousand, eighty-seven".