220288406 has 8 divisors (see below), whose sum is σ = 355850544. Its totient is φ = 101671560.

The previous prime is 220288361. The next prime is 220288459. The reversal of 220288406 is 604882022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4236290 + ... + 4236341.

It is an arithmetic number, because the mean of its divisors is an integer number (44481318).

Almost surely, 2^220288406 is an apocalyptic number.

220288406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

220288406 is a deficient number, since it is larger than the sum of its proper divisors (135562138).

220288406 is a wasteful number, since it uses less digits than its factorization.

220288406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472646.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 220288406 is about 14842.1159542701. The cubic root of 220288406 is about 603.9447543143.

The spelling of 220288406 in words is "two hundred twenty million, two hundred eighty-eight thousand, four hundred six".