2789636 has 6 divisors (see below), whose sum is σ = 4881870. Its totient is φ = 1394816.

The previous prime is 2789629. The next prime is 2789669. The reversal of 2789636 is 6369872.

It can be written as a sum of positive squares in only one way, i.e., 1943236 + 846400 = 1394^2 + 920^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2789593 and 2789602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348701 + ... + 348708.

It is an arithmetic number, because the mean of its divisors is an integer number (813645).

2^2789636 is an apocalyptic number.

It is an amenable number.

2789636 is a deficient number, since it is larger than the sum of its proper divisors (2092234).

2789636 is a wasteful number, since it uses less digits than its factorization.

2789636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697413 (or 697411 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 2789636 is about 1670.2203447450. The cubic root of 2789636 is about 140.7718591531.

The spelling of 2789636 in words is "two million, seven hundred eighty-nine thousand, six hundred thirty-six".