2389645 has 8 divisors (see below), whose sum is σ = 2945304. Its totient is φ = 1859904.

The previous prime is 2389643. The next prime is 2389657. The reversal of 2389645 is 5469832.

2389645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 702244 + 1687401 = 838^2 + 1299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2389645 - 2¹ = 2389643 is a prime.

It is a super-3 number, since 3×2389645³ = 40937509551163533375, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

2389645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2389643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6274 + ... + 6643.

It is an arithmetic number, because the mean of its divisors is an integer number (368163).

2^2389645 is an apocalyptic number.

It is an amenable number.

2389645 is a deficient number, since it is larger than the sum of its proper divisors (555659).

2389645 is a wasteful number, since it uses less digits than its factorization.

2389645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12959.

The product of its digits is 51840, while the sum is 37.

The square root of 2389645 is about 1545.8476639048. The cubic root of 2389645 is about 133.6937574693.

The spelling of 2389645 in words is "two million, three hundred eighty-nine thousand, six hundred forty-five".