1785130728 has 32 divisors (see below), whose sum is σ = 4616719200. Its totient is φ = 574524608.

The previous prime is 1785130703. The next prime is 1785130733. The reversal of 1785130728 is 8270315871.

It is a self number, because there is not a number n which added to its sum of digits gives 1785130728.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281726 + ... + 1283117.

It is an arithmetic number, because the mean of its divisors is an integer number (144272475).

Almost surely, 2^1785130728 is an apocalyptic number.

It is an amenable number.

1785130728 is an abundant number, since it is smaller than the sum of its proper divisors (2831588472).

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

1785130728 is a wasteful number, since it uses less digits than its factorization.

1785130728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564881 (or 2564877 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 1785130728 is about 42250.8074242375. The cubic root of 1785130728 is about 1213.0815808906.

The spelling of 1785130728 in words is "one billion, seven hundred eighty-five million, one hundred thirty thousand, seven hundred twenty-eight".