649654384 has 20 divisors (see below), whose sum is σ = 1324953640. Its totient is φ = 307730880.

The previous prime is 649654381. The next prime is 649654409. The reversal of 649654384 is 483456946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649654381) 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, 1068207 + ... + 1068814.

It is an arithmetic number, because the mean of its divisors is an integer number (66247682).

Almost surely, 2^649654384 is an apocalyptic number.

It is an amenable number.

649654384 is an abundant number, since it is smaller than the sum of its proper divisors (675299256).

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

649654384 is a wasteful number, since it uses less digits than its factorization.

649654384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137048 (or 2137042 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The square root of 649654384 is about 25488.3185793022. The cubic root of 649654384 is about 866.0855467905.

The spelling of 649654384 in words is "six hundred forty-nine million, six hundred fifty-four thousand, three hundred eighty-four".