2289780 has 36 divisors (see below), whose sum is σ = 6946212. Its totient is φ = 610560.

The previous prime is 2289779. The next prime is 2289803. The reversal of 2289780 is 879822.

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 820836 = 1212^2 + 906^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6181 + ... + 6540.

2^2289780 is an apocalyptic number.

2289780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2289780 is an abundant number, since it is smaller than the sum of its proper divisors (4656432).

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

2289780 is a wasteful number, since it uses less digits than its factorization.

2289780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12736 (or 12731 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2289780 is about 1513.2019032502. The cubic root of 2289780 is about 131.8048079250.

The spelling of 2289780 in words is "two million, two hundred eighty-nine thousand, seven hundred eighty".