2389815 has 24 divisors (see below), whose sum is σ = 4324320. Its totient is φ = 1218624.

The previous prime is 2389813. The next prime is 2389831. The reversal of 2389815 is 5189832.

It is not a de Polignac number, because 2389815 - 2¹ = 2389813 is a prime.

It is a super-2 number, since 2×2389815² = 11422431468450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2389815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2389813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2^2389815 is an apocalyptic number.

2389815 is a deficient number, since it is larger than the sum of its proper divisors (1934505).

2389815 is a wasteful number, since it uses less digits than its factorization.

2389815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343 (or 2340 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2389815 is about 1545.9026489401. The cubic root of 2389815 is about 133.6969277310.

The spelling of 2389815 in words is "two million, three hundred eighty-nine thousand, eight hundred fifteen".