649528 has 32 divisors (see below), whose sum is σ = 1361520. Its totient is φ = 290400.

The previous prime is 649511. The next prime is 649529. The reversal of 649528 is 825946.

It is a happy number.

649528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 649493 and 649502.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649528.

It is not an unprimeable number, because it can be changed into a prime (649529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10618 + ... + 10678.

2⁶⁴⁹⁵²⁸ 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 649528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680760).

649528 is an abundant number, since it is smaller than the sum of its proper divisors (711992).

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

649528 is a wasteful number, since it uses less digits than its factorization.

649528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 74 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 649528 is about 805.9329996966. The cubic root of 649528 is about 86.6029380282.

The spelling of 649528 in words is "six hundred forty-nine thousand, five hundred twenty-eight".