649170228 has 144 divisors (see below), whose sum is σ = 1887084864. Its totient is φ = 172569600.

The previous prime is 649170209. The next prime is 649170229. The reversal of 649170228 is 822071946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649170229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1009275 + ... + 1009917.

It is an arithmetic number, because the mean of its divisors is an integer number (13104756).

Almost surely, 2^649170228 is an apocalyptic number.

649170228 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649170228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943542432).

649170228 is an abundant number, since it is smaller than the sum of its proper divisors (1237914636).

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

649170228 is a wasteful number, since it uses less digits than its factorization.

649170228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 649170228 is about 25478.8192034089. The cubic root of 649170228 is about 865.8703427611.

The spelling of 649170228 in words is "six hundred forty-nine million, one hundred seventy thousand, two hundred twenty-eight".