2253720 has 64 divisors (see below), whose sum is σ = 7729920. Its totient is φ = 514944.

The previous prime is 2253709. The next prime is 2253721. The reversal of 2253720 is 273522.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2253721) 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, 502 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (120780).

2^2253720 is an apocalyptic number.

2253720 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 2253720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3864960).

2253720 is an abundant number, since it is smaller than the sum of its proper divisors (5476200).

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

2253720 is a wasteful number, since it uses less digits than its factorization.

2253720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 2253720 is about 1501.2394878899. The cubic root of 2253720 is about 131.1092459330.

The spelling of 2253720 in words is "two million, two hundred fifty-three thousand, seven hundred twenty".