2270720 has 40 divisors (see below), whose sum is σ = 5450544. Its totient is φ = 907264.

The previous prime is 2270717. The next prime is 2270759. The reversal of 2270720 is 270722.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2270692 and 2270701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2117 + ... + 3003.

2^2270720 is an apocalyptic number.

2270720 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 2270720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2725272).

2270720 is an abundant number, since it is smaller than the sum of its proper divisors (3179824).

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

2270720 is an frugal number, since it uses more digits than its factorization.

2270720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 2270720 is about 1506.8908387803. The cubic root of 2270720 is about 131.4380765472.

The spelling of 2270720 in words is "two million, two hundred seventy thousand, seven hundred twenty".