220306887 has 12 divisors (see below), whose sum is σ = 318351384. Its totient is φ = 146811120.

The previous prime is 220306883. The next prime is 220306897. The reversal of 220306887 is 788603022.

It is a happy number.

It is not a de Polignac number, because 220306887 - 2² = 220306883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220306883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34993 + ... + 40805.

It is an arithmetic number, because the mean of its divisors is an integer number (26529282).

Almost surely, 2^220306887 is an apocalyptic number.

220306887 is a deficient number, since it is larger than the sum of its proper divisors (98044497).

220306887 is a wasteful number, since it uses less digits than its factorization.

220306887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030 (or 10027 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 220306887 is about 14842.7385276437. The cubic root of 220306887 is about 603.9616430695.

The spelling of 220306887 in words is "two hundred twenty million, three hundred six thousand, eight hundred eighty-seven".