649872830 has 16 divisors (see below), whose sum is σ = 1170297504. Its totient is φ = 259832160.

The previous prime is 649872829. The next prime is 649872857. The reversal of 649872830 is 38278946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10820 + ... + 37640.

It is an arithmetic number, because the mean of its divisors is an integer number (73143594).

Almost surely, 2^649872830 is an apocalyptic number.

649872830 is a deficient number, since it is larger than the sum of its proper divisors (520424674).

649872830 is a wasteful number, since it uses less digits than its factorization.

649872830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29251.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 649872830 is about 25492.6034370756. The cubic root of 649872830 is about 866.1826095399.

The spelling of 649872830 in words is "six hundred forty-nine million, eight hundred seventy-two thousand, eight hundred thirty".