64434560 has 64 divisors (see below), whose sum is σ = 156023280. Its totient is φ = 25442304.

The previous prime is 64434553. The next prime is 64434583. The reversal of 64434560 is 6543446.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52514 + ... + 53726.

Almost surely, 2^64434560 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 64434560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78011640).

64434560 is an abundant number, since it is smaller than the sum of its proper divisors (91588720).

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

64434560 is a wasteful number, since it uses less digits than its factorization.

64434560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 64434560 is about 8027.1140517623. The cubic root of 64434560 is about 400.9032919570.

The spelling of 64434560 in words is "sixty-four million, four hundred thirty-four thousand, five hundred sixty".