2790638 has 4 divisors (see below), whose sum is σ = 4185960. Its totient is φ = 1395318.

The previous prime is 2790629. The next prime is 2790643. The reversal of 2790638 is 8360972.

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

It is a junction number, because it is equal to n+sod(n) for n = 2790598 and 2790607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697658 + ... + 697661.

It is an arithmetic number, because the mean of its divisors is an integer number (1046490).

2^2790638 is an apocalyptic number.

2790638 is a deficient number, since it is larger than the sum of its proper divisors (1395322).

2790638 is a wasteful number, since it uses less digits than its factorization.

2790638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395321.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 2790638 is about 1670.5202782367. The cubic root of 2790638 is about 140.7887115928.

The spelling of 2790638 in words is "two million, seven hundred ninety thousand, six hundred thirty-eight".