649585900 has 36 divisors (see below), whose sum is σ = 1410777760. Its totient is φ = 259617600.

The previous prime is 649585897. The next prime is 649585903. The reversal of 649585900 is 9585946.

It is an interprime number because it is at equal distance from previous prime (649585897) and next prime (649585903).

It is not an unprimeable number, because it can be changed into a prime (649585903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177085 + ... + 180715.

Almost surely, 2^649585900 is an apocalyptic number.

It is an amenable number.

649585900 is an abundant number, since it is smaller than the sum of its proper divisors (761191860).

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

649585900 is a wasteful number, since it uses less digits than its factorization.

649585900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434 (or 5427 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 649585900 is about 25486.9751049433. The cubic root of 649585900 is about 866.0551126149.

Adding to 649585900 its sum of digits (46), we get a palindrome (649585946).

The spelling of 649585900 in words is "six hundred forty-nine million, five hundred eighty-five thousand, nine hundred".