649885028 has 12 divisors (see below), whose sum is σ = 1224783420. Its totient is φ = 299946912.

The previous prime is 649885021. The next prime is 649885037. The reversal of 649885028 is 820588946.

It can be written as a sum of positive squares in 2 ways, for example, as 134050084 + 515834944 = 11578^2 + 22712^2 .

It is not an unprimeable number, because it can be changed into a prime (649885021) 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, 6248843 + ... + 6248946.

It is an arithmetic number, because the mean of its divisors is an integer number (102065285).

Almost surely, 2^649885028 is an apocalyptic number.

It is an amenable number.

649885028 is a deficient number, since it is larger than the sum of its proper divisors (574898392).

649885028 is a wasteful number, since it uses less digits than its factorization.

649885028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12497806 (or 12497804 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 649885028 is about 25492.8426818195. The cubic root of 649885028 is about 866.1880288717.

The spelling of 649885028 in words is "six hundred forty-nine million, eight hundred eighty-five thousand, twenty-eight".