3128556 has 12 divisors (see below), whose sum is σ = 7299992. Its totient is φ = 1042848.

The previous prime is 3128533. The next prime is 3128579. The reversal of 3128556 is 6558213.

It is an interprime number because it is at equal distance from previous prime (3128533) and next prime (3128579).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130345 + ... + 130368.

Almost surely, 2^3128556 is an apocalyptic number.

It is an amenable number.

3128556 is an abundant number, since it is smaller than the sum of its proper divisors (4171436).

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

3128556 is a wasteful number, since it uses less digits than its factorization.

3128556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260720 (or 260718 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 3128556 is about 1768.7724556878. The cubic root of 3128556 is about 146.2563208606.

The spelling of 3128556 in words is "three million, one hundred twenty-eight thousand, five hundred fifty-six".