728915650 has 12 divisors (see below), whose sum is σ = 1355783202. Its totient is φ = 291566240.

The previous prime is 728915633. The next prime is 728915669. The reversal of 728915650 is 56519827.

It can be written as a sum of positive squares in 3 ways, for example, as 537729721 + 191185929 = 23189^2 + 13827^2 .

It is a junction number, because it is equal to n+sod(n) for n = 728915597 and 728915606.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7289107 + ... + 7289206.

Almost surely, 2^728915650 is an apocalyptic number.

728915650 is a deficient number, since it is larger than the sum of its proper divisors (626867552).

728915650 is a wasteful number, since it uses less digits than its factorization.

728915650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14578325 (or 14578320 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 728915650 is about 26998.4379177759. The cubic root of 728915650 is about 899.9652867270.

The spelling of 728915650 in words is "seven hundred twenty-eight million, nine hundred fifteen thousand, six hundred fifty".