4006646 has 24 divisors (see below), whose sum is σ = 7193424. Its totient is φ = 1639440.

The previous prime is 4006637. The next prime is 4006649. The reversal of 4006646 is 6466004.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006649) 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 11 ways as a sum of consecutive naturals, for example, 7136 + ... + 7676.

It is an arithmetic number, because the mean of its divisors is an integer number (299726).

Almost surely, 2^4006646 is an apocalyptic number.

4006646 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

4006646 is a deficient number, since it is larger than the sum of its proper divisors (3186778).

4006646 is a wasteful number, since it uses less digits than its factorization.

4006646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 4006646 is about 2001.6608104272. The cubic root of 4006646 is about 158.8279721127.

The spelling of 4006646 in words is "four million, six thousand, six hundred forty-six".