3866406 has 8 divisors (see below), whose sum is σ = 7732824. Its totient is φ = 1288800.

The previous prime is 3866399. The next prime is 3866419. The reversal of 3866406 is 6046683.

It is a sphenic number, since it is the product of 3 distinct primes.

3866406 is an admirable number.

It is a congruent number.

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, 322195 + ... + 322206.

It is an arithmetic number, because the mean of its divisors is an integer number (966603).

Almost surely, 2^3866406 is an apocalyptic number.

3866406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3866406 is a wasteful number, since it uses less digits than its factorization.

3866406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644406.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 3866406 is about 1966.3178786758. The cubic root of 3866406 is about 156.9528304346.

The spelling of 3866406 in words is "three million, eight hundred sixty-six thousand, four hundred six".