64288656 has 60 divisors (see below), whose sum is σ = 184324140. Its totient is φ = 20904960.

The previous prime is 64288649. The next prime is 64288663. The reversal of 64288656 is 65688246.

It is an interprime number because it is at equal distance from previous prime (64288649) and next prime (64288663).

It can be written as a sum of positive squares in 2 ways, for example, as 2509056 + 61779600 = 1584^2 + 7860^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460 + ... + 11348.

It is an arithmetic number, because the mean of its divisors is an integer number (3072069).

Almost surely, 2^64288656 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 64288656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92162070).

64288656 is an abundant number, since it is smaller than the sum of its proper divisors (120035484).

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

64288656 is a wasteful number, since it uses less digits than its factorization.

64288656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944 (or 10935 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 64288656 is about 8018.0207033906. The cubic root of 64288656 is about 400.6004648206.

It can be divided in two parts, 642 and 88656, that added together give a palindrome (89298).

The spelling of 64288656 in words is "sixty-four million, two hundred eighty-eight thousand, six hundred fifty-six".