220819806 has 48 divisors (see below), whose sum is σ = 488052864. Its totient is φ = 72140112.

The previous prime is 220819801. The next prime is 220819813. The reversal of 220819806 is 608918022.

It is a super-2 number, since 2×220819806² = 97522773443755272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220819801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 340975 + ... + 341621.

It is an arithmetic number, because the mean of its divisors is an integer number (10167768).

Almost surely, 2^220819806 is an apocalyptic number.

220819806 is an abundant number, since it is smaller than the sum of its proper divisors (267233058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220819806 is a wasteful number, since it uses less digits than its factorization.

220819806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 220819806 is about 14860.0069313577. The cubic root of 220819806 is about 604.4299947461.

The spelling of 220819806 in words is "two hundred twenty million, eight hundred nineteen thousand, eight hundred six".