649984536 has 48 divisors (see below), whose sum is σ = 1768174200. Its totient is φ = 215701632.

The previous prime is 649984507. The next prime is 649984561. The reversal of 649984536 is 635489946.

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 11 ways as a sum of consecutive naturals, for example, 3541 + ... + 36228.

Almost surely, 2^649984536 is an apocalyptic number.

It is an amenable number.

649984536 is an abundant number, since it is smaller than the sum of its proper divisors (1118189664).

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

649984536 is a wasteful number, since it uses less digits than its factorization.

649984536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40008 (or 40001 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 649984536 is about 25494.7942921687. The cubic root of 649984536 is about 866.2322357882.

The spelling of 649984536 in words is "six hundred forty-nine million, nine hundred eighty-four thousand, five hundred thirty-six".