220390286 has 4 divisors (see below), whose sum is σ = 330585432. Its totient is φ = 110195142.

The previous prime is 220390279. The next prime is 220390307. The reversal of 220390286 is 682093022.

220390286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55097570 + ... + 55097573.

It is an arithmetic number, because the mean of its divisors is an integer number (82646358).

Almost surely, 2^220390286 is an apocalyptic number.

220390286 is a deficient number, since it is larger than the sum of its proper divisors (110195146).

220390286 is a wasteful number, since it uses less digits than its factorization.

220390286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110195145.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 220390286 is about 14845.5476827229. The cubic root of 220390286 is about 604.0378450184.

The spelling of 220390286 in words is "two hundred twenty million, three hundred ninety thousand, two hundred eighty-six".