649161088 has 32 divisors (see below), whose sum is σ = 1301528160. Its totient is φ = 322503168.

The previous prime is 649161053. The next prime is 649161089. The reversal of 649161088 is 880161946.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649161089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3945 + ... + 36247.

It is an arithmetic number, because the mean of its divisors is an integer number (40672755).

Almost surely, 2^649161088 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 649161088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650764080).

649161088 is an abundant number, since it is smaller than the sum of its proper divisors (652367072).

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

649161088 is a wasteful number, since it uses less digits than its factorization.

649161088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32474 (or 32462 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 649161088 is about 25478.6398381075. The cubic root of 649161088 is about 865.8662790647.

The spelling of 649161088 in words is "six hundred forty-nine million, one hundred sixty-one thousand, eighty-eight".