1568728920 has 128 divisors (see below), whose sum is σ = 5404320000. Its totient is φ = 360276480.

The previous prime is 1568728919. The next prime is 1568728949. The reversal of 1568728920 is 298278651.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1568728920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6195 + ... + 56354.

It is an arithmetic number, because the mean of its divisors is an integer number (42221250).

Almost surely, 2^1568728920 is an apocalyptic number.

1568728920 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 1568728920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2702160000).

1568728920 is an abundant number, since it is smaller than the sum of its proper divisors (3835591080).

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

1568728920 is a wasteful number, since it uses less digits than its factorization.

1568728920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62593 (or 62589 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1568728920 is about 39607.1826819328. The cubic root of 1568728920 is about 1161.9371417873.

The spelling of 1568728920 in words is "one billion, five hundred sixty-eight million, seven hundred twenty-eight thousand, nine hundred twenty".