220990394 has 16 divisors (see below), whose sum is σ = 347362560. Its totient is φ = 105243600.

The previous prime is 220990339. The next prime is 220990409. The reversal of 220990394 is 493099022.

220990394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 944 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (21710160).

Almost surely, 2^220990394 is an apocalyptic number.

220990394 is a deficient number, since it is larger than the sum of its proper divisors (126372166).

220990394 is a wasteful number, since it uses less digits than its factorization.

220990394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20365.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 220990394 is about 14865.7456590647. The cubic root of 220990394 is about 604.5855996954.

The spelling of 220990394 in words is "two hundred twenty million, nine hundred ninety thousand, three hundred ninety-four".