649888992 has 36 divisors (see below), whose sum is σ = 1848122640. Its totient is φ = 216629568.

The previous prime is 649888973. The next prime is 649888999. The reversal of 649888992 is 299888946.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649888999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1127992 + ... + 1128567.

It is an arithmetic number, because the mean of its divisors is an integer number (51336740).

Almost surely, 2^649888992 is an apocalyptic number.

It is an amenable number.

649888992 is an abundant number, since it is smaller than the sum of its proper divisors (1198233648).

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

649888992 is a wasteful number, since it uses less digits than its factorization.

649888992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256575 (or 2256564 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The square root of 649888992 is about 25492.9204290132. The cubic root of 649888992 is about 866.1897899844.

The spelling of 649888992 in words is "six hundred forty-nine million, eight hundred eighty-eight thousand, nine hundred ninety-two".