649986876 has 192 divisors, whose sum is σ = 2146959360. Its totient is φ = 165136320.

The previous prime is 649986851. The next prime is 649986913. The reversal of 649986876 is 678689946.

649986876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 390021 + ... + 391683.

It is an arithmetic number, because the mean of its divisors is an integer number (11182080).

Almost surely, 2^649986876 is an apocalyptic number.

649986876 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649986876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1073479680).

649986876 is an abundant number, since it is smaller than the sum of its proper divisors (1496972484).

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

649986876 is a wasteful number, since it uses less digits than its factorization.

649986876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741 (or 1733 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The square root of 649986876 is about 25494.8401838490. The cubic root of 649986876 is about 866.2332752904.

The spelling of 649986876 in words is "six hundred forty-nine million, nine hundred eighty-six thousand, eight hundred seventy-six".