2229720 has 64 divisors (see below), whose sum is σ = 7089120. Its totient is φ = 559104.

The previous prime is 2229713. The next prime is 2229767. The reversal of 2229720 is 279222.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 1494 + ... + 2586.

2^2229720 is an apocalyptic number.

2229720 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 2229720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3544560).

2229720 is an abundant number, since it is smaller than the sum of its proper divisors (4859400).

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

2229720 is a wasteful number, since it uses less digits than its factorization.

2229720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 2229720 is about 1493.2246984295. The cubic root of 2229720 is about 130.6421873251.

The spelling of 2229720 in words is "two million, two hundred twenty-nine thousand, seven hundred twenty".