1380052728 has 160 divisors (see below), whose sum is σ = 3992535360. Its totient is φ = 445132800.

The previous prime is 1380052717. The next prime is 1380052733. The reversal of 1380052728 is 8272500831.

1380052728 is a `hidden beast` number, since 1 + 380 + 0 + 5 + 272 + 8 = 666.

1380052728 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1380052692 and 1380052701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3441328 + ... + 3441728.

It is an arithmetic number, because the mean of its divisors is an integer number (24953346).

Almost surely, 2^1380052728 is an apocalyptic number.

1380052728 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 1380052728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996267680).

1380052728 is an abundant number, since it is smaller than the sum of its proper divisors (2612482632).

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

1380052728 is a wasteful number, since it uses less digits than its factorization.

1380052728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1380052728 is about 37149.0609302577. The cubic root of 1380052728 is about 1113.3504610494.

The spelling of 1380052728 in words is "one billion, three hundred eighty million, fifty-two thousand, seven hundred twenty-eight".