220998890 has 16 divisors (see below), whose sum is σ = 454626432. Its totient is φ = 75771024.

The previous prime is 220998889. The next prime is 220998893. The reversal of 220998890 is 98899022.

It is a happy number.

220998890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220998893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578494 + ... + 1578633.

It is an arithmetic number, because the mean of its divisors is an integer number (28414152).

Almost surely, 2^220998890 is an apocalyptic number.

220998890 is an abundant number, since it is smaller than the sum of its proper divisors (233627542).

220998890 is a wasteful number, since it uses less digits than its factorization.

220998890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157141.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 220998890 is about 14866.0314139316. The cubic root of 220998890 is about 604.5933473828.

The spelling of 220998890 in words is "two hundred twenty million, nine hundred ninety-eight thousand, eight hundred ninety".