2639834 has 4 divisors (see below), whose sum is σ = 3959754. Its totient is φ = 1319916.

The previous prime is 2639827. The next prime is 2639863. The reversal of 2639834 is 4389362.

It is a happy number.

2639834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 2569609 + 70225 = 1603^2 + 265^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2639794 and 2639803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659957 + ... + 659960.

2^2639834 is an apocalyptic number.

2639834 is a deficient number, since it is larger than the sum of its proper divisors (1319920).

2639834 is a wasteful number, since it uses less digits than its factorization.

2639834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319919.

The product of its digits is 31104, while the sum is 35.

The square root of 2639834 is about 1624.7565971554. The cubic root of 2639834 is about 138.2055677459.

The spelling of 2639834 in words is "two million, six hundred thirty-nine thousand, eight hundred thirty-four".