649285632 has 260 divisors, whose sum is σ = 2061510880. Its totient is φ = 203046912.

The previous prime is 649285621. The next prime is 649285633. The reversal of 649285632 is 236582946.

649285632 is a `hidden beast` number, since 6 + 4 + 9 + 2 + 8 + 5 + 632 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649285633) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6303693 + ... + 6303795.

It is an arithmetic number, because the mean of its divisors is an integer number (7928888).

Almost surely, 2^649285632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649285632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1030755440).

649285632 is an abundant number, since it is smaller than the sum of its proper divisors (1412225248).

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

649285632 is a wasteful number, since it uses less digits than its factorization.

649285632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 127 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 649285632 is about 25481.0838074051. The cubic root of 649285632 is about 865.9216487596.

The spelling of 649285632 in words is "six hundred forty-nine million, two hundred eighty-five thousand, six hundred thirty-two".