649982120 has 16 divisors (see below), whose sum is σ = 1462459860. Its totient is φ = 259992832.

The previous prime is 649982051. The next prime is 649982141. The reversal of 649982120 is 21289946.

It can be written as a sum of positive squares in 2 ways, for example, as 609201124 + 40780996 = 24682^2 + 6386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8124737 + ... + 8124816.

Almost surely, 2^649982120 is an apocalyptic number.

It is an amenable number.

649982120 is an abundant number, since it is smaller than the sum of its proper divisors (812477740).

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

649982120 is a wasteful number, since it uses less digits than its factorization.

649982120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16249564 (or 16249560 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 649982120 is about 25494.7469099028. The cubic root of 649982120 is about 866.2311625218.

The spelling of 649982120 in words is "six hundred forty-nine million, nine hundred eighty-two thousand, one hundred twenty".