220756890 has 32 divisors (see below), whose sum is σ = 546909696. Its totient is φ = 56969280.

The previous prime is 220756873. The next prime is 220756901. The reversal of 220756890 is 98657022.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117757 + ... + 119616.

It is an arithmetic number, because the mean of its divisors is an integer number (17090928).

Almost surely, 2^220756890 is an apocalyptic number.

220756890 is an abundant number, since it is smaller than the sum of its proper divisors (326152806).

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

220756890 is a wasteful number, since it uses less digits than its factorization.

220756890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237414.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 220756890 is about 14857.8898232555. The cubic root of 220756890 is about 604.3725845429.

The spelling of 220756890 in words is "two hundred twenty million, seven hundred fifty-six thousand, eight hundred ninety".