2399489 has 8 divisors (see below), whose sum is σ = 2510760. Its totient is φ = 2290176.

The previous prime is 2399479. The next prime is 2399497. The reversal of 2399489 is 9849932.

It can be written as a sum of positive squares in 4 ways, for example, as 27889 + 2371600 = 167^2 + 1540^2 .

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 2399489 - 2¹⁶ = 2333953 is a prime.

It is a super-2 number, since 2×2399489² = 11515094922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2399479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2387 + ... + 3239.

It is an arithmetic number, because the mean of its divisors is an integer number (313845).

2^2399489 is an apocalyptic number.

2399489 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2399489 is a deficient number, since it is larger than the sum of its proper divisors (111271).

2399489 is an equidigital number, since it uses as much as digits as its factorization.

2399489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979.

The product of its digits is 139968, while the sum is 44.

The square root of 2399489 is about 1549.0284051624. The cubic root of 2399489 is about 133.8770871131.

The spelling of 2399489 in words is "two million, three hundred ninety-nine thousand, four hundred eighty-nine".