2856406 has 12 divisors (see below), whose sum is σ = 4984308. Its totient is φ = 1224132.

The previous prime is 2856397. The next prime is 2856409. The reversal of 2856406 is 6046582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14476 + ... + 14671.

It is an arithmetic number, because the mean of its divisors is an integer number (415359).

2^2856406 is an apocalyptic number.

2856406 is a deficient number, since it is larger than the sum of its proper divisors (2127902).

2856406 is a wasteful number, since it uses less digits than its factorization.

2856406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29163 (or 29156 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2856406 is about 1690.0905301196. The cubic root of 2856406 is about 141.8861416208.

The spelling of 2856406 in words is "two million, eight hundred fifty-six thousand, four hundred six".