3129656 has 32 divisors (see below), whose sum is σ = 6233760. Its totient is φ = 1469952.

The previous prime is 3129641. The next prime is 3129677. The reversal of 3129656 is 6569213.

It is a happy number.

3129656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 13316 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (194805).

Almost surely, 2^3129656 is an apocalyptic number.

It is an amenable number.

3129656 is a deficient number, since it is larger than the sum of its proper divisors (3104104).

3129656 is a wasteful number, since it uses less digits than its factorization.

3129656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 331 counting only the distinct ones).

The product of its digits is 9720, while the sum is 32.

The square root of 3129656 is about 1769.0833784760. The cubic root of 3129656 is about 146.2734600883.

The spelling of 3129656 in words is "three million, one hundred twenty-nine thousand, six hundred fifty-six".