649904830 has 8 divisors (see below), whose sum is σ = 1169828712. Its totient is φ = 259961928.

The previous prime is 649904809. The next prime is 649904831. The reversal of 649904830 is 38409946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649904831) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32495232 + ... + 32495251.

It is an arithmetic number, because the mean of its divisors is an integer number (146228589).

Almost surely, 2^649904830 is an apocalyptic number.

649904830 is a deficient number, since it is larger than the sum of its proper divisors (519923882).

649904830 is a wasteful number, since it uses less digits than its factorization.

649904830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64990490.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 649904830 is about 25493.2310623820. The cubic root of 649904830 is about 866.1968263668.

The spelling of 649904830 in words is "six hundred forty-nine million, nine hundred four thousand, eight hundred thirty".