649057250 has 16 divisors (see below), whose sum is σ = 1215035640. Its totient is φ = 259622800.

The previous prime is 649057237. The next prime is 649057313. The reversal of 649057250 is 52750946.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55696369 + 593360881 = 7463^2 + 24359^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297865 + ... + 1298364.

Almost surely, 2^649057250 is an apocalyptic number.

649057250 is a deficient number, since it is larger than the sum of its proper divisors (565978390).

649057250 is a wasteful number, since it uses less digits than its factorization.

649057250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596246 (or 2596236 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 649057250 is about 25476.6020104723. The cubic root of 649057250 is about 865.8201094166.

The spelling of 649057250 in words is "six hundred forty-nine million, fifty-seven thousand, two hundred fifty".