649209708 has 96 divisors (see below), whose sum is σ = 2024870400. Its totient is φ = 175722048.

The previous prime is 649209683. The next prime is 649209749. The reversal of 649209708 is 807902946.

It is a happy number.

649209708 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-5 number, since 5×649209708⁵ (a number of 45 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8235 + ... + 36962.

It is an arithmetic number, because the mean of its divisors is an integer number (21092400).

Almost surely, 2^649209708 is an apocalyptic number.

It is an amenable number.

649209708 is an abundant number, since it is smaller than the sum of its proper divisors (1375660692).

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

649209708 is a wasteful number, since it uses less digits than its factorization.

649209708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45236 (or 45228 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 649209708 is about 25479.5939528086. The cubic root of 649209708 is about 865.8878953570.

The spelling of 649209708 in words is "six hundred forty-nine million, two hundred nine thousand, seven hundred eight".