1608891084 has 72 divisors (see below), whose sum is σ = 4337358480. Its totient is φ = 501092352.

The previous prime is 1608891079. The next prime is 1608891131. The reversal of 1608891084 is 4801988061.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75612 + ... + 94524.

It is an arithmetic number, because the mean of its divisors is an integer number (60241090).

Almost surely, 2^1608891084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1608891084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168679240).

1608891084 is an abundant number, since it is smaller than the sum of its proper divisors (2728467396).

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

1608891084 is a wasteful number, since it uses less digits than its factorization.

1608891084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19079 (or 19074 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 1608891084 is about 40110.9845802867. The cubic root of 1608891084 is about 1171.7695685927.

The spelling of 1608891084 in words is "one billion, six hundred eight million, eight hundred ninety-one thousand, eighty-four".