649837206 has 48 divisors (see below), whose sum is σ = 1492867584. Its totient is φ = 203588352.

The previous prime is 649837171. The next prime is 649837219. The reversal of 649837206 is 602738946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 389931 + ... + 391593.

It is an arithmetic number, because the mean of its divisors is an integer number (31101408).

Almost surely, 2^649837206 is an apocalyptic number.

649837206 is an abundant number, since it is smaller than the sum of its proper divisors (843030378).

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

649837206 is a wasteful number, since it uses less digits than its factorization.

649837206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965 (or 2962 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 649837206 is about 25491.9047150267. The cubic root of 649837206 is about 866.1667821084.

The spelling of 649837206 in words is "six hundred forty-nine million, eight hundred thirty-seven thousand, two hundred six".