220656790 has 16 divisors (see below), whose sum is σ = 397356912. Its totient is φ = 88223904.

The previous prime is 220656773. The next prime is 220656803. The reversal of 220656790 is 97656022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33337 + ... + 39403.

It is an arithmetic number, because the mean of its divisors is an integer number (24834807).

Almost surely, 2^220656790 is an apocalyptic number.

220656790 is a deficient number, since it is larger than the sum of its proper divisors (176700122).

220656790 is a wasteful number, since it uses less digits than its factorization.

220656790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9711.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 220656790 is about 14854.5208606673. The cubic root of 220656790 is about 604.2812218346.

It can be divided in two parts, 2206 and 56790, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 220656790 in words is "two hundred twenty million, six hundred fifty-six thousand, seven hundred ninety".