64221416 has 64 divisors (see below), whose sum is σ = 143095680. Its totient is φ = 26449920.

The previous prime is 64221389. The next prime is 64221419. The reversal of 64221416 is 61412246.

It is not an unprimeable number, because it can be changed into a prime (64221419) 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, 190400 + ... + 190736.

It is an arithmetic number, because the mean of its divisors is an integer number (2235870).

Almost surely, 2^64221416 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 64221416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71547840).

64221416 is an abundant number, since it is smaller than the sum of its proper divisors (78874264).

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

64221416 is a wasteful number, since it uses less digits than its factorization.

64221416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 470 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 64221416 is about 8013.8265516543. The cubic root of 64221416 is about 400.4607523976.

The spelling of 64221416 in words is "sixty-four million, two hundred twenty-one thousand, four hundred sixteen".