2398509 has 12 divisors (see below), whose sum is σ = 3615456. Its totient is φ = 1529352.

The previous prime is 2398507. The next prime is 2398523. The reversal of 2398509 is 9058932.

It is not a de Polignac number, because 2398509 - 2¹ = 2398507 is a prime.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5587 + ... + 6000.

It is an arithmetic number, because the mean of its divisors is an integer number (301288).

2^2398509 is an apocalyptic number.

It is an amenable number.

2398509 is a deficient number, since it is larger than the sum of its proper divisors (1216947).

2398509 is a wasteful number, since it uses less digits than its factorization.

2398509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616 (or 11613 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2398509 is about 1548.7120455398. The cubic root of 2398509 is about 133.8588585916.

The spelling of 2398509 in words is "two million, three hundred ninety-eight thousand, five hundred nine".