1640606 has 8 divisors (see below), whose sum is σ = 2684664. Its totient is φ = 745720.

The previous prime is 1640599. The next prime is 1640609. The reversal of 1640606 is 6060461.

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

1640606 is a modest number, since divided by 606 gives 164 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37265 + ... + 37308.

It is an arithmetic number, because the mean of its divisors is an integer number (335583).

2^1640606 is an apocalyptic number.

1640606 is a deficient number, since it is larger than the sum of its proper divisors (1044058).

1640606 is a wasteful number, since it uses less digits than its factorization.

1640606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74586.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1640606 is about 1280.8614288829. The cubic root of 1640606 is about 117.9418942112.

The spelling of 1640606 in words is "one million, six hundred forty thousand, six hundred six".