64336340 has 48 divisors (see below), whose sum is σ = 139732992. Its totient is φ = 24863616.

The previous prime is 64336331. The next prime is 64336351. The reversal of 64336340 is 4363346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167789 + ... + 168171.

It is an arithmetic number, because the mean of its divisors is an integer number (2911104).

Almost surely, 2^64336340 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 64336340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69866496).

64336340 is an abundant number, since it is smaller than the sum of its proper divisors (75396652).

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

64336340 is a wasteful number, since it uses less digits than its factorization.

64336340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 64336340 is about 8020.9937040245. The cubic root of 64336340 is about 400.6994844242.

Adding to 64336340 its reverse (4363346), we get a palindrome (68699686).

The spelling of 64336340 in words is "sixty-four million, three hundred thirty-six thousand, three hundred forty".