2489638 has 4 divisors (see below), whose sum is σ = 3734460. Its totient is φ = 1244818.

The previous prime is 2489611. The next prime is 2489639. The reversal of 2489638 is 8369842.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2489638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489639) 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 as a sum of consecutive naturals, namely, 622408 + ... + 622411.

It is an arithmetic number, because the mean of its divisors is an integer number (933615).

2^2489638 is an apocalyptic number.

2489638 is a deficient number, since it is larger than the sum of its proper divisors (1244822).

2489638 is a wasteful number, since it uses less digits than its factorization.

2489638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244821.

The product of its digits is 82944, while the sum is 40.

The square root of 2489638 is about 1577.8586755473. The cubic root of 2489638 is about 135.5331091961.

The spelling of 2489638 in words is "two million, four hundred eighty-nine thousand, six hundred thirty-eight".