1550728368 has 160 divisors (see below), whose sum is σ = 5262758400. Its totient is φ = 427762944.

The previous prime is 1550728357. The next prime is 1550728369. The reversal of 1550728368 is 8638270551.

1550728368 is a `hidden beast` number, since 1 + 5 + 507 + 2 + 83 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (1550728369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78855 + ... + 96537.

It is an arithmetic number, because the mean of its divisors is an integer number (32892240).

Almost surely, 2^1550728368 is an apocalyptic number.

1550728368 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 1550728368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2631379200).

1550728368 is an abundant number, since it is smaller than the sum of its proper divisors (3712030032).

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

1550728368 is a wasteful number, since it uses less digits than its factorization.

1550728368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736 (or 17724 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 1550728368 is about 39379.2885664533. The cubic root of 1550728368 is about 1157.4757754992.

The spelling of 1550728368 in words is "one billion, five hundred fifty million, seven hundred twenty-eight thousand, three hundred sixty-eight".