649040210 has 64 divisors (see below), whose sum is σ = 1441843200. Its totient is φ = 204844032.

The previous prime is 649040167. The next prime is 649040219. The reversal of 649040210 is 12040946.

649040210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 649040210.

It is not an unprimeable number, because it can be changed into a prime (649040219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435146 + ... + 436634.

It is an arithmetic number, because the mean of its divisors is an integer number (22528800).

Almost surely, 2^649040210 is an apocalyptic number.

649040210 is an abundant number, since it is smaller than the sum of its proper divisors (792802990).

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

649040210 is a wasteful number, since it uses less digits than its factorization.

649040210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 649040210 is about 25476.2675837729. The cubic root of 649040210 is about 865.8125324251.

The spelling of 649040210 in words is "six hundred forty-nine million, forty thousand, two hundred ten".