905945728 has 32 divisors (see below), whose sum is σ = 1806700500. Its totient is φ = 452499456.

The previous prime is 905945723. The next prime is 905945731. The reversal of 905945728 is 827549509.

It can be written as a sum of positive squares in 2 ways, for example, as 806105664 + 99840064 = 28392^2 + 9992^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (905945723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141378 + ... + 147646.

Almost surely, 2^905945728 is an apocalyptic number.

It is an amenable number.

905945728 is a deficient number, since it is larger than the sum of its proper divisors (900754772).

905945728 is a wasteful number, since it uses less digits than its factorization.

905945728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7412 (or 7400 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 905945728 is about 30098.9323398688. The cubic root of 905945728 is about 967.6108446428.

The spelling of 905945728 in words is "nine hundred five million, nine hundred forty-five thousand, seven hundred twenty-eight".