3181406 has 24 divisors (see below), whose sum is σ = 5202624. Its totient is φ = 1457280.

The previous prime is 3181391. The next prime is 3181411. The reversal of 3181406 is 6041813.

3181406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 11 ways as a sum of consecutive naturals, for example, 32750 + ... + 32846.

It is an arithmetic number, because the mean of its divisors is an integer number (216776).

Almost surely, 2^3181406 is an apocalyptic number.

3181406 is a deficient number, since it is larger than the sum of its proper divisors (2021218).

3181406 is a wasteful number, since it uses less digits than its factorization.

3181406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 3181406 is about 1783.6496292714. The cubic root of 3181406 is about 147.0752849902.

The spelling of 3181406 in words is "three million, one hundred eighty-one thousand, four hundred six".