2439998 has 8 divisors (see below), whose sum is σ = 3992760. Its totient is φ = 1109080.

The previous prime is 2439991. The next prime is 2440003. The reversal of 2439998 is 8999342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 2²¹ + 4⁹ + 3⁹ + 9³ + 9³ + 9⁵ + 8³ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439991) 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 3 ways as a sum of consecutive naturals, for example, 55433 + ... + 55476.

It is an arithmetic number, because the mean of its divisors is an integer number (499095).

2^2439998 is an apocalyptic number.

2439998 is a deficient number, since it is larger than the sum of its proper divisors (1552762).

2439998 is a wasteful number, since it uses less digits than its factorization.

2439998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110922.

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

The square root of 2439998 is about 1562.0492949968. The cubic root of 2439998 is about 134.6262731622.

The spelling of 2439998 in words is "two million, four hundred thirty-nine thousand, nine hundred ninety-eight".