64809368 has 64 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 28828800.

The previous prime is 64809359. The next prime is 64809373. The reversal of 64809368 is 86390846.

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, 494663 + ... + 494793.

It is an arithmetic number, because the mean of its divisors is an integer number (2120580).

Almost surely, 2^64809368 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 64809368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67858560).

64809368 is an abundant number, since it is smaller than the sum of its proper divisors (70907752).

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

64809368 is a wasteful number, since it uses less digits than its factorization.

64809368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 64809368 is about 8050.4265725488. The cubic root of 64809368 is about 401.6791248200.

The spelling of 64809368 in words is "sixty-four million, eight hundred nine thousand, three hundred sixty-eight".