649808754 has 64 divisors (see below), whose sum is σ = 1527240960. Its totient is φ = 180449280.

The previous prime is 649808741. The next prime is 649808767. The reversal of 649808754 is 457808946.

It is an interprime number because it is at equal distance from previous prime (649808741) and next prime (649808767).

It is a junction number, because it is equal to n+sod(n) for n = 649808697 and 649808706.

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 31 ways as a sum of consecutive naturals, for example, 607332 + ... + 608400.

It is an arithmetic number, because the mean of its divisors is an integer number (23863140).

Almost surely, 2^649808754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649808754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763620480).

649808754 is an abundant number, since it is smaller than the sum of its proper divisors (877432206).

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

649808754 is a wasteful number, since it uses less digits than its factorization.

649808754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 649808754 is about 25491.3466494024. The cubic root of 649808754 is about 866.1541407183.

The spelling of 649808754 in words is "six hundred forty-nine million, eight hundred eight thousand, seven hundred fifty-four".