649883520 has 512 divisors, whose sum is σ = 2714342400. Its totient is φ = 144875520.

The previous prime is 649883513. The next prime is 649883539. The reversal of 649883520 is 25388946.

649883520 is a `hidden beast` number, since 6 + 49 + 8 + 83 + 520 = 666.

649883520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2470909 + ... + 2471171.

It is an arithmetic number, because the mean of its divisors is an integer number (5301450).

Almost surely, 2^649883520 is an apocalyptic number.

649883520 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 649883520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357171200).

649883520 is an abundant number, since it is smaller than the sum of its proper divisors (2064458880).

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

649883520 is a wasteful number, since it uses less digits than its factorization.

649883520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 649883520 is about 25492.8131048733. The cubic root of 649883520 is about 866.1873589006.

The spelling of 649883520 in words is "six hundred forty-nine million, eight hundred eighty-three thousand, five hundred twenty".