1606388 has 24 divisors (see below), whose sum is σ = 3249792. Its totient is φ = 680544.

The previous prime is 1606387. The next prime is 1606399. The reversal of 1606388 is 8836061.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606 + ... + 3162.

It is an arithmetic number, because the mean of its divisors is an integer number (135408).

2^1606388 is an apocalyptic number.

It is an amenable number.

1606388 is an abundant number, since it is smaller than the sum of its proper divisors (1643404).

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

1606388 is a wasteful number, since it uses less digits than its factorization.

1606388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1606388 is about 1267.4336274535. The cubic root of 1606388 is about 117.1161580466.

The spelling of 1606388 in words is "one million, six hundred six thousand, three hundred eighty-eight".