649451488 has 108 divisors (see below), whose sum is σ = 1540452816. Its totient is φ = 268732800.

The previous prime is 649451461. The next prime is 649451497. The reversal of 649451488 is 884154946.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 17 ways as a sum of consecutive naturals, for example, 1506633 + ... + 1507063.

It is an arithmetic number, because the mean of its divisors is an integer number (14263452).

Almost surely, 2^649451488 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 649451488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770226408).

649451488 is an abundant number, since it is smaller than the sum of its proper divisors (891001328).

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

649451488 is a wasteful number, since it uses less digits than its factorization.

649451488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 471 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 649451488 is about 25484.3380922480. The cubic root of 649451488 is about 865.9953739261.

The spelling of 649451488 in words is "six hundred forty-nine million, four hundred fifty-one thousand, four hundred eighty-eight".