64343420 has 48 divisors (see below), whose sum is σ = 142164288. Its totient is φ = 24414720.

The previous prime is 64343417. The next prime is 64343429. The reversal of 64343420 is 2434346.

It is a self number, because there is not a number n which added to its sum of digits gives 64343420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64343429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62510 + ... + 63530.

It is an arithmetic number, because the mean of its divisors is an integer number (2961756).

Almost surely, 2^64343420 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 64343420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71082144).

64343420 is an abundant number, since it is smaller than the sum of its proper divisors (77820868).

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

64343420 is a wasteful number, since it uses less digits than its factorization.

64343420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 64343420 is about 8021.4350337081. The cubic root of 64343420 is about 400.7141824331.

Adding to 64343420 its reverse (2434346), we get a palindrome (66777766).

The spelling of 64343420 in words is "sixty-four million, three hundred forty-three thousand, four hundred twenty".