3181628 has 12 divisors (see below), whose sum is σ = 5617920. Its totient is φ = 1576512.

The previous prime is 3181627. The next prime is 3181637. The reversal of 3181628 is 8261813.

It is a self number, because there is not a number n which added to its sum of digits gives 3181628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3181627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3068 + ... + 3971.

It is an arithmetic number, because the mean of its divisors is an integer number (468160).

Almost surely, 2^3181628 is an apocalyptic number.

It is an amenable number.

3181628 is a deficient number, since it is larger than the sum of its proper divisors (2436292).

3181628 is a wasteful number, since it uses less digits than its factorization.

3181628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156 (or 7154 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 3181628 is about 1783.7118601389. The cubic root of 3181628 is about 147.0787059047.

The spelling of 3181628 in words is "three million, one hundred eighty-one thousand, six hundred twenty-eight".