1606628 has 12 divisors (see below), whose sum is σ = 2843820. Its totient is φ = 794112.

The previous prime is 1606603. The next prime is 1606639. The reversal of 1606628 is 8266061.

It can be written as a sum of positive squares in 2 ways, for example, as 88804 + 1517824 = 298^2 + 1232^2 .

It is a super-4 number, since 4×1606628⁴ (a number of 26 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1606628.

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, 1901 + ... + 2612.

It is an arithmetic number, because the mean of its divisors is an integer number (236985).

2^1606628 is an apocalyptic number.

It is an amenable number.

1606628 is a deficient number, since it is larger than the sum of its proper divisors (1237192).

1606628 is a wasteful number, since it uses less digits than its factorization.

1606628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606 (or 4604 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1606628 is about 1267.5283034315. The cubic root of 1606628 is about 117.1219902777.

The spelling of 1606628 in words is "one million, six hundred six thousand, six hundred twenty-eight".