220488987 has 6 divisors (see below), whose sum is σ = 294019612. Its totient is φ = 146975512.

The previous prime is 220488973. The next prime is 220489039. The reversal of 220488987 is 789884022.

It is not a de Polignac number, because 220488987 - 2¹⁶ = 220423451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220488937) 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 5 ways as a sum of consecutive naturals, for example, 21433 + ... + 30005.

Almost surely, 2^220488987 is an apocalyptic number.

220488987 is a deficient number, since it is larger than the sum of its proper divisors (73530625).

220488987 is an frugal number, since it uses more digits than its factorization.

220488987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17149 (or 8576 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 220488987 is about 14848.8715732880. The cubic root of 220488987 is about 604.1280036223.

Multiplying 220488987 by its sum of digits (48), we get a square (10583471376 = 102876²).

The spelling of 220488987 in words is "two hundred twenty million, four hundred eighty-eight thousand, nine hundred eighty-seven".