649983876 has 24 divisors (see below), whose sum is σ = 1535829120. Its totient is φ = 213918432.

The previous prime is 649983871. The next prime is 649983889. The reversal of 649983876 is 678389946.

It is not an unprimeable number, because it can be changed into a prime (649983871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341871 + ... + 343766.

It is an arithmetic number, because the mean of its divisors is an integer number (63992880).

Almost surely, 2^649983876 is an apocalyptic number.

It is an amenable number.

649983876 is an abundant number, since it is smaller than the sum of its proper divisors (885845244).

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

649983876 is a wasteful number, since it uses less digits than its factorization.

649983876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685723 (or 685721 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The square root of 649983876 is about 25494.7813483466. The cubic root of 649983876 is about 866.2319425948.

The spelling of 649983876 in words is "six hundred forty-nine million, nine hundred eighty-three thousand, eight hundred seventy-six".