649375272 has 128 divisors (see below), whose sum is σ = 2220153600. Its totient is φ = 171258624.

The previous prime is 649375249. The next prime is 649375273. The reversal of 649375272 is 272573946.

649375272 is a `hidden beast` number, since 6 + 4 + 9 + 375 + 272 = 666.

It is not an unprimeable number, because it can be changed into a prime (649375273) 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, 3138 + ... + 36174.

It is an arithmetic number, because the mean of its divisors is an integer number (17344950).

Almost surely, 2^649375272 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 649375272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110076800).

649375272 is an abundant number, since it is smaller than the sum of its proper divisors (1570778328).

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

649375272 is a wasteful number, since it uses less digits than its factorization.

649375272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33072 (or 33062 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 649375272 is about 25482.8426985688. The cubic root of 649375272 is about 865.9614964738.

The spelling of 649375272 in words is "six hundred forty-nine million, three hundred seventy-five thousand, two hundred seventy-two".