1520733568 has 64 divisors (see below), whose sum is σ = 3100392000. Its totient is φ = 742809600.

The previous prime is 1520733517. The next prime is 1520733569. The reversal of 1520733568 is 8653370251.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1520733568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520733569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020568 + ... + 1022056.

It is an arithmetic number, because the mean of its divisors is an integer number (48443625).

Almost surely, 2^1520733568 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 1520733568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550196000).

1520733568 is an abundant number, since it is smaller than the sum of its proper divisors (1579658432).

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

1520733568 is a wasteful number, since it uses less digits than its factorization.

1520733568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 1520733568 is about 38996.5840555298. The cubic root of 1520733568 is about 1149.9643512579.

The spelling of 1520733568 in words is "one billion, five hundred twenty million, seven hundred thirty-three thousand, five hundred sixty-eight".