16406646 has 8 divisors (see below), whose sum is σ = 32813304. Its totient is φ = 5468880.

The previous prime is 16406639. The next prime is 16406653. The reversal of 16406646 is 64660461.

It is an interprime number because it is at equal distance from previous prime (16406639) and next prime (16406653).

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

16406646 is an admirable number.

It is a Curzon 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, 1367215 + ... + 1367226.

It is an arithmetic number, because the mean of its divisors is an integer number (4101663).

Almost surely, 2^16406646 is an apocalyptic number.

16406646 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.

16406646 is a wasteful number, since it uses less digits than its factorization.

16406646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734446.

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

The square root of 16406646 is about 4050.5118195112. The cubic root of 16406646 is about 254.1011335959.

The spelling of 16406646 in words is "sixteen million, four hundred six thousand, six hundred forty-six".