2304639 has 16 divisors (see below), whose sum is σ = 3615840. Its totient is φ = 1445760.

The previous prime is 2304637. The next prime is 2304647. The reversal of 2304639 is 9364032.

2304639 is a `hidden beast` number, since 23 + 0 + 4 + 639 = 666.

It is not a de Polignac number, because 2304639 - 2¹ = 2304637 is a prime.

It is a super-2 number, since 2×2304639² = 10622721840642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2¹⁹ + 3¹¹ + 0 + 4⁵ + 6⁵ + 3¹³ + 9² .

2304639 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2304637) 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 15 ways as a sum of consecutive naturals, for example, 2052 + ... + 2969.

It is an arithmetic number, because the mean of its divisors is an integer number (225990).

2^2304639 is an apocalyptic number.

2304639 is a deficient number, since it is larger than the sum of its proper divisors (1311201).

2304639 is a wasteful number, since it uses less digits than its factorization.

2304639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047 (or 5041 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 2304639 is about 1518.1037513951. The cubic root of 2304639 is about 132.0892990790.

The spelling of 2304639 in words is "two million, three hundred four thousand, six hundred thirty-nine".