920227220 has 48 divisors (see below), whose sum is σ = 2122194816. Its totient is φ = 332400000.

The previous prime is 920227193. The next prime is 920227229. The reversal of 920227220 is 22722029.

It is a super-3 number, since 3×920227220³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 920227220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920227229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19370 + ... + 47070.

It is an arithmetic number, because the mean of its divisors is an integer number (44212392).

Almost surely, 2^920227220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920227220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061097408).

920227220 is an abundant number, since it is smaller than the sum of its proper divisors (1201967596).

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

920227220 is a wasteful number, since it uses less digits than its factorization.

920227220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27872 (or 27870 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 920227220 is about 30335.2471557428. The cubic root of 920227220 is about 972.6688890602.

Adding to 920227220 its reverse (22722029), we get a palindrome (942949249).

The spelling of 920227220 in words is "nine hundred twenty million, two hundred twenty-seven thousand, two hundred twenty".