1606618 has 16 divisors (see below), whose sum is σ = 2640456. Its totient is φ = 728640.

The previous prime is 1606603. The next prime is 1606639. The reversal of 1606618 is 8166061.

It can be written as a sum of positive squares in 4 ways, for example, as 149769 + 1456849 = 387^2 + 1207^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 2092.

2^1606618 is an apocalyptic number.

1606618 is a deficient number, since it is larger than the sum of its proper divisors (1033838).

1606618 is a wasteful number, since it uses less digits than its factorization.

1606618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1606618 is about 1267.5243587403. The cubic root of 1606618 is about 117.1217472796.

The spelling of 1606618 in words is "one million, six hundred six thousand, six hundred eighteen".