2938639 has 8 divisors (see below), whose sum is σ = 3219840. Its totient is φ = 2659800.

The previous prime is 2938627. The next prime is 2938667. The reversal of 2938639 is 9368392.

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

It is a de Polignac number, because none of the positive numbers 2^k-2938639 is a prime.

It is a super-3 number, since 3×2938639³ = 76130725548450633357, which contains 333 as substring.

It is a Duffinian number.

2938639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2938609) 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 7 ways as a sum of consecutive naturals, for example, 2992 + ... + 3850.

It is an arithmetic number, because the mean of its divisors is an integer number (402480).

2^2938639 is an apocalyptic number.

2938639 is a deficient number, since it is larger than the sum of its proper divisors (281201).

2938639 is a wasteful number, since it uses less digits than its factorization.

2938639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its digits is 69984, while the sum is 40.

The square root of 2938639 is about 1714.2458983471. The cubic root of 2938639 is about 143.2348659680.

The spelling of 2938639 in words is "two million, nine hundred thirty-eight thousand, six hundred thirty-nine".