913220 has 48 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 284160.

The previous prime is 913217. The next prime is 913247. The reversal of 913220 is 22319.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2⁹¹³²²⁰ 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 913220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197504).

913220 is an abundant number, since it is smaller than the sum of its proper divisors (1481788).

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

913220 is a wasteful number, since it uses less digits than its factorization.

913220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 913220 is about 955.6254496402. The cubic root of 913220 is about 97.0193747390.

Adding to 913220 its reverse (22319), we get a palindrome (935539).

The spelling of 913220 in words is "nine hundred thirteen thousand, two hundred twenty".