729428650 has 12 divisors (see below), whose sum is σ = 1356737382. Its totient is φ = 291771440.

The previous prime is 729428633. The next prime is 729428669. The reversal of 729428650 is 56824927.

It can be written as a sum of positive squares in 3 ways, for example, as 708571161 + 20857489 = 26619^2 + 4567^2 .

It is a junction number, because it is equal to n+sod(n) for n = 729428597 and 729428606.

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, 7294237 + ... + 7294336.

Almost surely, 2^729428650 is an apocalyptic number.

729428650 is a deficient number, since it is larger than the sum of its proper divisors (627308732).

729428650 is a wasteful number, since it uses less digits than its factorization.

729428650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14588585 (or 14588580 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 729428650 is about 27007.9367964308. The cubic root of 729428650 is about 900.1763646142.

The spelling of 729428650 in words is "seven hundred twenty-nine million, four hundred twenty-eight thousand, six hundred fifty".