649784532 has 12 divisors (see below), whose sum is σ = 1516163936. Its totient is φ = 216594840.

The previous prime is 649784501. The next prime is 649784543. The reversal of 649784532 is 235487946.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27074344 + ... + 27074367.

Almost surely, 2^649784532 is an apocalyptic number.

It is an amenable number.

649784532 is an abundant number, since it is smaller than the sum of its proper divisors (866379404).

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

649784532 is a wasteful number, since it uses less digits than its factorization.

649784532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54148718 (or 54148716 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 649784532 is about 25490.8715425738. The cubic root of 649784532 is about 866.1433784511.

The spelling of 649784532 in words is "six hundred forty-nine million, seven hundred eighty-four thousand, five hundred thirty-two".