649917528 has 64 divisors (see below), whose sum is σ = 1774483200. Its totient is φ = 197151360.

The previous prime is 649917517. The next prime is 649917539. The reversal of 649917528 is 825719946.

It is an interprime number because it is at equal distance from previous prime (649917517) and next prime (649917539).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7483 + ... + 36821.

It is an arithmetic number, because the mean of its divisors is an integer number (27726300).

Almost surely, 2^649917528 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 649917528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887241600).

649917528 is an abundant number, since it is smaller than the sum of its proper divisors (1124565672).

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

649917528 is a wasteful number, since it uses less digits than its factorization.

649917528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29432 (or 29428 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 649917528 is about 25493.4801076667. The cubic root of 649917528 is about 866.2024676521.

The spelling of 649917528 in words is "six hundred forty-nine million, nine hundred seventeen thousand, five hundred twenty-eight".