1606919328 has 144 divisors (see below), whose sum is σ = 5329396800. Its totient is φ = 459091584.

The previous prime is 1606919291. The next prime is 1606919333. The reversal of 1606919328 is 8239196061.

It is a happy number.

1606919328 is a `hidden beast` number, since 1 + 606 + 9 + 1 + 9 + 32 + 8 = 666.

1606919328 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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, 90651 + ... + 106917.

It is an arithmetic number, because the mean of its divisors is an integer number (37009700).

Almost surely, 2^1606919328 is an apocalyptic number.

1606919328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606919328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2664698400).

1606919328 is an abundant number, since it is smaller than the sum of its proper divisors (3722477472).

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

1606919328 is a wasteful number, since it uses less digits than its factorization.

1606919328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16304 (or 16279 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1606919328 is about 40086.3982916899. The cubic root of 1606919328 is about 1171.2906904825.

The spelling of 1606919328 in words is "one billion, six hundred six million, nine hundred nineteen thousand, three hundred twenty-eight".