1606443442 has 8 divisors (see below), whose sum is σ = 2412028332. Its totient is φ = 802434000.

The previous prime is 1606443439. The next prime is 1606443463. The reversal of 1606443442 is 2443446061.

It can be written as a sum of positive squares in 2 ways, for example, as 1571408881 + 35034561 = 39641^2 + 5919^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1606443398 and 1606443407.

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, 391309 + ... + 395392.

Almost surely, 2^1606443442 is an apocalyptic number.

1606443442 is a deficient number, since it is larger than the sum of its proper divisors (805584890).

1606443442 is a wasteful number, since it uses less digits than its factorization.

1606443442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787724.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 1606443442 is about 40080.4620981345. The cubic root of 1606443442 is about 1171.1750539214.

The spelling of 1606443442 in words is "one billion, six hundred six million, four hundred forty-three thousand, four hundred forty-two".