12870638 has 32 divisors (see below), whose sum is σ = 22740480. Its totient is φ = 5400000.

The previous prime is 12870629. The next prime is 12870647. The reversal of 12870638 is 83607821.

It is an interprime number because it is at equal distance from previous prime (12870629) and next prime (12870647).

It is a junction number, because it is equal to n+sod(n) for n = 12870598 and 12870607.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16763 + ... + 17513.

It is an arithmetic number, because the mean of its divisors is an integer number (710640).

Almost surely, 2^12870638 is an apocalyptic number.

12870638 is a deficient number, since it is larger than the sum of its proper divisors (9869842).

12870638 is a wasteful number, since it uses less digits than its factorization.

12870638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 12870638 is about 3587.5671422288. The cubic root of 12870638 is about 234.3509356745.

The spelling of 12870638 in words is "twelve million, eight hundred seventy thousand, six hundred thirty-eight".