2645389 has 16 divisors (see below), whose sum is σ = 2954880. Its totient is φ = 2358720.

The previous prime is 2645371. The next prime is 2645393. The reversal of 2645389 is 9835462.

2645389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2645389 - 2¹¹ = 2643341 is a prime.

It is a super-2 number, since 2×2645389² = 13996165922642, which contains 22 as substring.

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

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 4⁶ + 5³ + 3⁹ + 8⁷ + 9 .

Its product of digits (51840) is a multiple of the sum of its prime divisors (180).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645329) 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 15 ways as a sum of consecutive naturals, for example, 37224 + ... + 37294.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

2^2645389 is an apocalyptic number.

It is an amenable number.

2645389 is a deficient number, since it is larger than the sum of its proper divisors (309491).

2645389 is a wasteful number, since it uses less digits than its factorization.

2645389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180.

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

The square root of 2645389 is about 1626.4651856096. The cubic root of 2645389 is about 138.3024417722.

The spelling of 2645389 in words is "two million, six hundred forty-five thousand, three hundred eighty-nine".