220644454 has 16 divisors (see below), whose sum is σ = 349934400. Its totient is φ = 104051304.

The previous prime is 220644433. The next prime is 220644509. The reversal of 220644454 is 454446022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 4164 + ... + 21415.

It is an arithmetic number, because the mean of its divisors is an integer number (21870900).

Almost surely, 2^220644454 is an apocalyptic number.

220644454 is a deficient number, since it is larger than the sum of its proper divisors (129289946).

220644454 is a wasteful number, since it uses less digits than its factorization.

220644454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25827.

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 220644454 is about 14854.1056277381. The cubic root of 220644454 is about 604.2699606779.

The spelling of 220644454 in words is "two hundred twenty million, six hundred forty-four thousand, four hundred fifty-four".