64326820 has 12 divisors (see below), whose sum is σ = 135086364. Its totient is φ = 25730720.

The previous prime is 64326817. The next prime is 64326841. The reversal of 64326820 is 2862346.

64326820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36385024 + 27941796 = 6032^2 + 5286^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608151 + ... + 1608190.

It is an arithmetic number, because the mean of its divisors is an integer number (11257197).

Almost surely, 2^64326820 is an apocalyptic number.

It is an amenable number.

64326820 is an abundant number, since it is smaller than the sum of its proper divisors (70759544).

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

64326820 is a wasteful number, since it uses less digits than its factorization.

64326820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216350 (or 3216348 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64326820 is about 8020.4002393896. The cubic root of 64326820 is about 400.6797192999.

The spelling of 64326820 in words is "sixty-four million, three hundred twenty-six thousand, eight hundred twenty".