650728690 has 16 divisors (see below), whose sum is σ = 1176430680. Its totient is φ = 259153920.

The previous prime is 650728649. The next prime is 650728717. The reversal of 650728690 is 96827056.

650728690 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 4 ways, for example, as 553331529 + 97397161 = 23523^2 + 9869^2 .

It is a super-2 number, since 2×650728690² = 846895655978232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139791 + ... + 144370.

Almost surely, 2^650728690 is an apocalyptic number.

650728690 is a deficient number, since it is larger than the sum of its proper divisors (525701990).

650728690 is a wasteful number, since it uses less digits than its factorization.

650728690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284397.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 650728690 is about 25509.3843516460. The cubic root of 650728690 is about 866.5626869008.

The spelling of 650728690 in words is "six hundred fifty million, seven hundred twenty-eight thousand, six hundred ninety".