649508692 has 48 divisors (see below), whose sum is σ = 1369863040. Its totient is φ = 263233152.

The previous prime is 649508687. The next prime is 649508729. The reversal of 649508692 is 296805946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580918 + ... + 582034.

Almost surely, 2^649508692 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 649508692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684931520).

649508692 is an abundant number, since it is smaller than the sum of its proper divisors (720354348).

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

649508692 is a wasteful number, since it uses less digits than its factorization.

649508692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 649508692 is about 25485.4604039244. The cubic root of 649508692 is about 866.0207989429.

The spelling of 649508692 in words is "six hundred forty-nine million, five hundred eight thousand, six hundred ninety-two".