1608386646 has 8 divisors (see below), whose sum is σ = 3216773304. Its totient is φ = 536128880.

The previous prime is 1608386639. The next prime is 1608386687. The reversal of 1608386646 is 6466838061.

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

1608386646 is an admirable number.

It is a super-2 number, since 2×1608386646² = 5173815206062258632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1608386595 and 1608386604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134032215 + ... + 134032226.

It is an arithmetic number, because the mean of its divisors is an integer number (402096663).

Almost surely, 2^1608386646 is an apocalyptic number.

1608386646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1608386646 is a wasteful number, since it uses less digits than its factorization.

1608386646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268064446.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 1608386646 is about 40104.6960591899. The cubic root of 1608386646 is about 1171.6470935768.

The spelling of 1608386646 in words is "one billion, six hundred eight million, three hundred eighty-six thousand, six hundred forty-six".