64947684 has 48 divisors (see below), whose sum is σ = 163513728. Its totient is φ = 19987968.

The previous prime is 64947683. The next prime is 64947689. The reversal of 64947684 is 48674946.

It is not an unprimeable number, because it can be changed into a prime (64947683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7809 + ... + 13815.

It is an arithmetic number, because the mean of its divisors is an integer number (3406536).

Almost surely, 2^64947684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64947684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81756864).

64947684 is an abundant number, since it is smaller than the sum of its proper divisors (98566044).

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

64947684 is a wasteful number, since it uses less digits than its factorization.

64947684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6084 (or 6082 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 64947684 is about 8059.0125946049. The cubic root of 64947684 is about 401.9646759882.

The spelling of 64947684 in words is "sixty-four million, nine hundred forty-seven thousand, six hundred eighty-four".