64221024 has 96 divisors (see below), whose sum is σ = 193971456. Its totient is φ = 18224640.

The previous prime is 64221013. The next prime is 64221029. The reversal of 64221024 is 42012246.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64221029) 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, 152334 + ... + 152754.

It is an arithmetic number, because the mean of its divisors is an integer number (2020536).

Almost surely, 2^64221024 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 64221024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96985728).

64221024 is an abundant number, since it is smaller than the sum of its proper divisors (129750432).

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

64221024 is a wasteful number, since it uses less digits than its factorization.

64221024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 64221024 is about 8013.8020938878. The cubic root of 64221024 is about 400.4599376075.

The spelling of 64221024 in words is "sixty-four million, two hundred twenty-one thousand, twenty-four".