649149500 has 96 divisors (see below), whose sum is σ = 1469307840. Its totient is φ = 250387200.

The previous prime is 649149481. The next prime is 649149509. The reversal of 649149500 is 5941946.

649149500 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-3 number, since 3×649149500³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649149509) 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, 2343362 + ... + 2343638.

It is an arithmetic number, because the mean of its divisors is an integer number (15305290).

Almost surely, 2^649149500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649149500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734653920).

649149500 is an abundant number, since it is smaller than the sum of its proper divisors (820158340).

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

649149500 is a wasteful number, since it uses less digits than its factorization.

649149500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 649149500 is about 25478.4124309188. The cubic root of 649149500 is about 865.8611269187.

The spelling of 649149500 in words is "six hundred forty-nine million, one hundred forty-nine thousand, five hundred".