649863480 has 192 divisors, whose sum is σ = 2298240000. Its totient is φ = 146555136.

The previous prime is 649863463. The next prime is 649863481. The reversal of 649863480 is 84368946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649863481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 463821 + ... + 465219.

It is an arithmetic number, because the mean of its divisors is an integer number (11970000).

Almost surely, 2^649863480 is an apocalyptic number.

649863480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649863480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120000).

649863480 is an abundant number, since it is smaller than the sum of its proper divisors (1648376520).

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

649863480 is a wasteful number, since it uses less digits than its factorization.

649863480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1495 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 649863480 is about 25492.4200498893. The cubic root of 649863480 is about 866.1784554727.

The spelling of 649863480 in words is "six hundred forty-nine million, eight hundred sixty-three thousand, four hundred eighty".