220990000 has 300 divisors, whose sum is σ = 695533608. Its totient is φ = 67200000.

The previous prime is 220989997. The next prime is 220990001. The reversal of 220990000 is 99022.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (220990001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5389980 + ... + 5390020.

Almost surely, 2^220990000 is an apocalyptic number.

220990000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220990000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347766804).

220990000 is an abundant number, since it is smaller than the sum of its proper divisors (474543608).

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

220990000 is a wasteful number, since it uses less digits than its factorization.

220990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 220990000 is about 14865.7324071167. The cubic root of 220990000 is about 604.5852403934.

It can be divided in two parts, 2209 and 90000, that multiplied together give a square (198810000 = 14100²).

The spelling of 220990000 in words is "two hundred twenty million, nine hundred ninety thousand".