2289690 has 96 divisors (see below), whose sum is σ = 6814080. Its totient is φ = 528768.

The previous prime is 2289689. The next prime is 2289697. The reversal of 2289690 is 969822.

It is a super-2 number, since 2×2289690² = 10485360592200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2289697) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22179 + ... + 22281.

It is an arithmetic number, because the mean of its divisors is an integer number (70980).

2^2289690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2289690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3407040).

2289690 is an abundant number, since it is smaller than the sum of its proper divisors (4524390).

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

2289690 is a wasteful number, since it uses less digits than its factorization.

2289690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 2289690 is about 1513.1721646924. The cubic root of 2289690 is about 131.8030810360.

The spelling of 2289690 in words is "two million, two hundred eighty-nine thousand, six hundred ninety".