648967836 has 24 divisors (see below), whose sum is σ = 1651918464. Its totient is φ = 196656880.

The previous prime is 648967831. The next prime is 648967849. The reversal of 648967836 is 638769846.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648967831) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2458080 + ... + 2458343.

It is an arithmetic number, because the mean of its divisors is an integer number (68829936).

Almost surely, 2^648967836 is an apocalyptic number.

648967836 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

648967836 is an abundant number, since it is smaller than the sum of its proper divisors (1002950628).

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

648967836 is a wasteful number, since it uses less digits than its factorization.

648967836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916441 (or 4916439 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 57.

The square root of 648967836 is about 25474.8471241733. The cubic root of 648967836 is about 865.7803491877.

The spelling of 648967836 in words is "six hundred forty-eight million, nine hundred sixty-seven thousand, eight hundred thirty-six".