649859730 has 32 divisors (see below), whose sum is σ = 1679638464. Its totient is φ = 159965376.

The previous prime is 649859713. The next prime is 649859761. The reversal of 649859730 is 37958946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832764 + ... + 833543.

It is an arithmetic number, because the mean of its divisors is an integer number (52488702).

Almost surely, 2^649859730 is an apocalyptic number.

649859730 is an abundant number, since it is smaller than the sum of its proper divisors (1029778734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649859730 is a wasteful number, since it uses less digits than its factorization.

649859730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666330.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 649859730 is about 25492.3464985081. The cubic root of 649859730 is about 866.1767893918.

The spelling of 649859730 in words is "six hundred forty-nine million, eight hundred fifty-nine thousand, seven hundred thirty".