220995390 has 192 divisors, whose sum is σ = 685532160. Its totient is φ = 45077760.

The previous prime is 220995377. The next prime is 220995407. The reversal of 220995390 is 93599022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1277344 + ... + 1277516.

It is an arithmetic number, because the mean of its divisors is an integer number (3570480).

Almost surely, 2^220995390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220995390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342766080).

220995390 is an abundant number, since it is smaller than the sum of its proper divisors (464536770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220995390 is a wasteful number, since it uses less digits than its factorization.

220995390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 220995390 is about 14865.9136954309. The cubic root of 220995390 is about 604.5901556806.

The spelling of 220995390 in words is "two hundred twenty million, nine hundred ninety-five thousand, three hundred ninety".