64723284 has 54 divisors (see below), whose sum is σ = 173824014. Its totient is φ = 20302080.

The previous prime is 64723271. The next prime is 64723313. The reversal of 64723284 is 48232746.

64723284 is a `hidden beast` number, since 647 + 2 + 3 + 2 + 8 + 4 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 9548100 + 55175184 = 3090^2 + 7428^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7294 + ... + 13514.

Almost surely, 2^64723284 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 64723284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86912007).

64723284 is an abundant number, since it is smaller than the sum of its proper divisors (109100730).

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

64723284 is a wasteful number, since it uses less digits than its factorization.

64723284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265 (or 6243 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 64723284 is about 8045.0782469781. The cubic root of 64723284 is about 401.5012006103.

The spelling of 64723284 in words is "sixty-four million, seven hundred twenty-three thousand, two hundred eighty-four".