2402689 has 4 divisors (see below), whose sum is σ = 2426580. Its totient is φ = 2378800.

The previous prime is 2402677. The next prime is 2402707. The reversal of 2402689 is 9862042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1481089 + 921600 = 1217^2 + 960^2 .

It is a cyclic number.

It is not a de Polignac number, because 2402689 - 2⁹ = 2402177 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 2402689.

It is not an unprimeable number, because it can be changed into a prime (2402639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11794 + ... + 11995.

It is an arithmetic number, because the mean of its divisors is an integer number (606645).

2^2402689 is an apocalyptic number.

It is an amenable number.

2402689 is a deficient number, since it is larger than the sum of its proper divisors (23891).

2402689 is a wasteful number, since it uses less digits than its factorization.

2402689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23890.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2402689 is about 1550.0609665429. The cubic root of 2402689 is about 133.9365742756.

The spelling of 2402689 in words is "two million, four hundred two thousand, six hundred eighty-nine".