220988138 has 24 divisors (see below), whose sum is σ = 386460000. Its totient is φ = 94498488.

The previous prime is 220988129. The next prime is 220988143. The reversal of 220988138 is 831889022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 220988095 and 220988104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46643 + ... + 51161.

It is an arithmetic number, because the mean of its divisors is an integer number (16102500).

Almost surely, 2^220988138 is an apocalyptic number.

220988138 is a deficient number, since it is larger than the sum of its proper divisors (165471862).

220988138 is a wasteful number, since it uses less digits than its factorization.

220988138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034 (or 5027 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 220988138 is about 14865.6697797307. The cubic root of 220988138 is about 604.5835423665.

The spelling of 220988138 in words is "two hundred twenty million, nine hundred eighty-eight thousand, one hundred thirty-eight".