64469784 has 64 divisors (see below), whose sum is σ = 167904000. Its totient is φ = 20603520.

The previous prime is 64469719. The next prime is 64469791. The reversal of 64469784 is 48796446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146637 + ... + 147075.

It is an arithmetic number, because the mean of its divisors is an integer number (2623500).

Almost surely, 2^64469784 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 64469784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83952000).

64469784 is an abundant number, since it is smaller than the sum of its proper divisors (103434216).

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

64469784 is a wasteful number, since it uses less digits than its factorization.

64469784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 684 counting only the distinct ones).

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

The square root of 64469784 is about 8029.3078157460. The cubic root of 64469784 is about 400.9763316690.

The spelling of 64469784 in words is "sixty-four million, four hundred sixty-nine thousand, seven hundred eighty-four".