2639289 has 8 divisors (see below), whose sum is σ = 3526560. Its totient is φ = 1755776.

The previous prime is 2639251. The next prime is 2639291. The reversal of 2639289 is 9829362.

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

It is a cyclic number.

It is not a de Polignac number, because 2639289 - 2²⁰ = 1590713 is a prime.

It is a d-powerful number, because it can be written as 2 + 6⁵ + 3⁷ + 9³ + 2 + 8⁷ + 9⁶ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2639239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2314 + ... + 3260.

It is an arithmetic number, because the mean of its divisors is an integer number (440820).

2^2639289 is an apocalyptic number.

It is an amenable number.

2639289 is a deficient number, since it is larger than the sum of its proper divisors (887271).

2639289 is an equidigital number, since it uses as much as digits as its factorization.

2639289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879.

The product of its digits is 46656, while the sum is 39.

The square root of 2639289 is about 1624.5888710686. The cubic root of 2639289 is about 138.1960561354.

The spelling of 2639289 in words is "two million, six hundred thirty-nine thousand, two hundred eighty-nine".