1608769620 has 192 divisors, whose sum is σ = 5215472640. Its totient is φ = 411319296.

The previous prime is 1608769601. The next prime is 1608769637. The reversal of 1608769620 is 269678061.

1608769620 is a `hidden beast` number, since 16 + 0 + 8 + 7 + 6 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 63 ways as a sum of consecutive naturals, for example, 1457989 + ... + 1459091.

It is an arithmetic number, because the mean of its divisors is an integer number (27163920).

Almost surely, 2^1608769620 is an apocalyptic number.

1608769620 is a gapful number since it is divisible by the number (10) 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 1608769620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2607736320).

1608769620 is an abundant number, since it is smaller than the sum of its proper divisors (3606703020).

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

1608769620 is a wasteful number, since it uses less digits than its factorization.

1608769620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1608769620 is about 40109.4704527497. The cubic root of 1608769620 is about 1171.7400800830.

The spelling of 1608769620 in words is "one billion, six hundred eight million, seven hundred sixty-nine thousand, six hundred twenty".