220628690 has 16 divisors (see below), whose sum is σ = 397837440. Its totient is φ = 88094640.

The previous prime is 220628659. The next prime is 220628693. The reversal of 220628690 is 96826022.

It is a super-2 number, since 2×220628690² = 97354037702232200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220628690.

It is not an unprimeable number, because it can be changed into a prime (220628693) 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 7 ways as a sum of consecutive naturals, for example, 13610 + ... + 25029.

It is an arithmetic number, because the mean of its divisors is an integer number (24864840).

Almost surely, 2^220628690 is an apocalyptic number.

220628690 is a deficient number, since it is larger than the sum of its proper divisors (177208750).

220628690 is a wasteful number, since it uses less digits than its factorization.

220628690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39217.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 220628690 is about 14853.5749905536. The cubic root of 220628690 is about 604.2555695940.

The spelling of 220628690 in words is "two hundred twenty million, six hundred twenty-eight thousand, six hundred ninety".