2273920 has 128 divisors (see below), whose sum is σ = 6609600. Its totient is φ = 737280.

The previous prime is 2273911. The next prime is 2273923. The reversal of 2273920 is 293722.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (2273923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119671 + ... + 119689.

2^2273920 is an apocalyptic number.

2273920 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 2273920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3304800).

2273920 is an abundant number, since it is smaller than the sum of its proper divisors (4335680).

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

2273920 is a wasteful number, since it uses less digits than its factorization.

2273920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2273920 is about 1507.9522538860. The cubic root of 2273920 is about 131.4997903682.

The spelling of 2273920 in words is "two million, two hundred seventy-three thousand, nine hundred twenty".