64420480 has 128 divisors (see below), whose sum is σ = 169205760. Its totient is φ = 23347200.

The previous prime is 64420451. The next prime is 64420481. The reversal of 64420480 is 8402446.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (64420481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337185 + ... + 337375.

It is an arithmetic number, because the mean of its divisors is an integer number (1321920).

Almost surely, 2^64420480 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 64420480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84602880).

64420480 is an abundant number, since it is smaller than the sum of its proper divisors (104785280).

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

64420480 is a wasteful number, since it uses less digits than its factorization.

64420480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 64420480 is about 8026.2369763171. The cubic root of 64420480 is about 400.8740885318.

The spelling of 64420480 in words is "sixty-four million, four hundred twenty thousand, four hundred eighty".