870728616 has 40 divisors (see below), whose sum is σ = 2438848170. Its totient is φ = 290242656.

The previous prime is 870728611. The next prime is 870728633. The reversal of 870728616 is 616827078.

870728616 is a `hidden beast` number, since 8 + 7 + 0 + 7 + 28 + 616 = 666.

870728616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 781426116 + 89302500 = 27954^2 + 9450^2 .

It is not an unprimeable number, because it can be changed into a prime (870728611) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 671211 + ... + 672506.

Almost surely, 2^870728616 is an apocalyptic number.

It is an amenable number.

870728616 is an abundant number, since it is smaller than the sum of its proper divisors (1568119554).

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

870728616 is a wasteful number, since it uses less digits than its factorization.

870728616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343735 (or 1343722 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 870728616 is about 29508.1110205313. Note that the first 3 decimals coincide. The cubic root of 870728616 is about 954.9066970239.

The spelling of 870728616 in words is "eight hundred seventy million, seven hundred twenty-eight thousand, six hundred sixteen".