1606868928 has 140 divisors (see below), whose sum is σ = 5443851952. Its totient is φ = 459095040.

The previous prime is 1606868903. The next prime is 1606868929. The reversal of 1606868928 is 8298686061.

It is a happy number.

1606868928 is a `hidden beast` number, since 1 + 606 + 8 + 6 + 8 + 9 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606868929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14148 + ... + 58428.

Almost surely, 2^1606868928 is an apocalyptic number.

1606868928 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 1606868928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721925976).

1606868928 is an abundant number, since it is smaller than the sum of its proper divisors (3836983024).

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

1606868928 is an equidigital number, since it uses as much as digits as its factorization.

1606868928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44312 (or 44293 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 1606868928 is about 40085.7696446008. The cubic root of 1606868928 is about 1171.2784447592.

The spelling of 1606868928 in words is "one billion, six hundred six million, eight hundred sixty-eight thousand, nine hundred twenty-eight".