649770560 has 28 divisors (see below), whose sum is σ = 1547266908. Its totient is φ = 259908096.

The previous prime is 649770559. The next prime is 649770581. The reversal of 649770560 is 65077946.

It can be written as a sum of positive squares in 2 ways, for example, as 70694464 + 579076096 = 8408^2 + 24064^2 .

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, 1014947 + ... + 1015586.

Almost surely, 2^649770560 is an apocalyptic number.

It is an amenable number.

649770560 is an abundant number, since it is smaller than the sum of its proper divisors (897496348).

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

649770560 is a wasteful number, since it uses less digits than its factorization.

649770560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030550 (or 2030540 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 649770560 is about 25490.5974822090. The cubic root of 649770560 is about 866.1371703203.

The spelling of 649770560 in words is "six hundred forty-nine million, seven hundred seventy thousand, five hundred sixty".