64534320 has 200 divisors, whose sum is σ = 234422496. Its totient is φ = 16422912.

The previous prime is 64534319. The next prime is 64534339. The reversal of 64534320 is 2343546.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 148824 + ... + 149256.

Almost surely, 2^64534320 is an apocalyptic number.

64534320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64534320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117211248).

64534320 is an abundant number, since it is smaller than the sum of its proper divisors (169888176).

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

64534320 is a wasteful number, since it uses less digits than its factorization.

64534320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 64534320 is about 8033.3255878248. The cubic root of 64534320 is about 401.1100831055.

Adding to 64534320 its reverse (2343546), we get a palindrome (66877866).

The spelling of 64534320 in words is "sixty-four million, five hundred thirty-four thousand, three hundred twenty".