9220440 has 32 divisors (see below), whose sum is σ = 27661680. Its totient is φ = 2458752.

The previous prime is 9220439. The next prime is 9220441. The reversal of 9220440 is 440229.

It is an interprime number because it is at equal distance from previous prime (9220439) and next prime (9220441).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9220441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38299 + ... + 38538.

Almost surely, 2^9220440 is an apocalyptic number.

It is an amenable number.

9220440 is an abundant number, since it is smaller than the sum of its proper divisors (18441240).

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

9220440 is a wasteful number, since it uses less digits than its factorization.

9220440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76851 (or 76847 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 9220440 is about 3036.5177424148. The cubic root of 9220440 is about 209.6929753783.

Adding to 9220440 its reverse (440229), we get a palindrome (9660669).

The spelling of 9220440 in words is "nine million, two hundred twenty thousand, four hundred forty".