64529784 has 120 divisors (see below), whose sum is σ = 198909480. Its totient is φ = 19530720.

The previous prime is 64529783. The next prime is 64529797. The reversal of 64529784 is 48792546.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64529783) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 77997 + ... + 78819.

It is an arithmetic number, because the mean of its divisors is an integer number (1657579).

Almost surely, 2^64529784 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 64529784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99454740).

64529784 is an abundant number, since it is smaller than the sum of its proper divisors (134379696).

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

64529784 is a wasteful number, since it uses less digits than its factorization.

64529784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 839 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 64529784 is about 8033.0432589399. The cubic root of 64529784 is about 401.1006851192.

The spelling of 64529784 in words is "sixty-four million, five hundred twenty-nine thousand, seven hundred eighty-four".