649496760 has 384 divisors, whose sum is σ = 2370124800. Its totient is φ = 140958720.

The previous prime is 649496719. The next prime is 649496843. The reversal of 649496760 is 67694946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13819057 + ... + 13819103.

It is an arithmetic number, because the mean of its divisors is an integer number (6172200).

Almost surely, 2^649496760 is an apocalyptic number.

649496760 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 649496760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185062400).

649496760 is an abundant number, since it is smaller than the sum of its proper divisors (1720628040).

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

649496760 is a wasteful number, since it uses less digits than its factorization.

649496760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The square root of 649496760 is about 25485.2263085891. The cubic root of 649496760 is about 866.0154957429.

The spelling of 649496760 in words is "six hundred forty-nine million, four hundred ninety-six thousand, seven hundred sixty".