728975770 has 32 divisors (see below), whose sum is σ = 1326124800. Its totient is φ = 288501696.

The previous prime is 728975761. The next prime is 728975789. The reversal of 728975770 is 77579827.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509416 + ... + 510844.

It is an arithmetic number, because the mean of its divisors is an integer number (41441400).

Almost surely, 2^728975770 is an apocalyptic number.

728975770 is a deficient number, since it is larger than the sum of its proper divisors (597149030).

728975770 is a wasteful number, since it uses less digits than its factorization.

728975770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942.

The product of its (nonzero) digits is 1728720, while the sum is 52.

The square root of 728975770 is about 26999.5512925678. The cubic root of 728975770 is about 899.9900286961.

It can be divided in two parts, 7289757 and 70, that added together give a palindrome (7289827).

The spelling of 728975770 in words is "seven hundred twenty-eight million, nine hundred seventy-five thousand, seven hundred seventy".