3867656 has 16 divisors (see below), whose sum is σ = 7809900. Its totient is φ = 1785024.

The previous prime is 3867649. The next prime is 3867679. The reversal of 3867656 is 6567683.

It can be written as a sum of positive squares in 2 ways, for example, as 3865156 + 2500 = 1966^2 + 50^2 .

It is an Ulam number.

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 in 3 ways as a sum of consecutive naturals, for example, 18491 + ... + 18698.

Almost surely, 2^3867656 is an apocalyptic number.

It is an amenable number.

3867656 is an abundant number, since it is smaller than the sum of its proper divisors (3942244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3867656 is a wasteful number, since it uses less digits than its factorization.

3867656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37208 (or 37204 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 3867656 is about 1966.6357059710. The cubic root of 3867656 is about 156.9697427729.

The spelling of 3867656 in words is "three million, eight hundred sixty-seven thousand, six hundred fifty-six".