64724296 has 72 divisors (see below), whose sum is σ = 153022770. Its totient is φ = 25579008.

The previous prime is 64724293. The next prime is 64724299. The reversal of 64724296 is 69242746.

It is an interprime number because it is at equal distance from previous prime (64724293) and next prime (64724299).

It can be written as a sum of positive squares in 3 ways, for example, as 48804196 + 15920100 = 6986^2 + 3990^2 .

It is not an unprimeable number, because it can be changed into a prime (64724291) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 65760 + ... + 66736.

Almost surely, 2^64724296 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 64724296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76511385).

64724296 is an abundant number, since it is smaller than the sum of its proper divisors (88298474).

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

64724296 is a wasteful number, since it uses less digits than its factorization.

64724296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 999 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 64724296 is about 8045.1411423293. The cubic root of 64724296 is about 401.5032931963.

The spelling of 64724296 in words is "sixty-four million, seven hundred twenty-four thousand, two hundred ninety-six".