64289568 has 144 divisors (see below), whose sum is σ = 199946880. Its totient is φ = 18031104.

The previous prime is 64289543. The next prime is 64289581. The reversal of 64289568 is 86598246.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371530 + ... + 371702.

It is an arithmetic number, because the mean of its divisors is an integer number (1388520).

Almost surely, 2^64289568 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 64289568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99973440).

64289568 is an abundant number, since it is smaller than the sum of its proper divisors (135657312).

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

64289568 is a wasteful number, since it uses less digits than its factorization.

64289568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 264 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 64289568 is about 8018.0775750800. The cubic root of 64289568 is about 400.6023591201.

The spelling of 64289568 in words is "sixty-four million, two hundred eighty-nine thousand, five hundred sixty-eight".