64405338 has 16 divisors (see below), whose sum is σ = 128889696. Its totient is φ = 21455280.

The previous prime is 64405337. The next prime is 64405343. The reversal of 64405338 is 83350446.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 64405299 and 64405308.

It is not an unprimeable number, because it can be changed into a prime (64405331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16020 + ... + 19632.

It is an arithmetic number, because the mean of its divisors is an integer number (8055606).

Almost surely, 2^64405338 is an apocalyptic number.

64405338 is an abundant number, since it is smaller than the sum of its proper divisors (64484358).

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

64405338 is a wasteful number, since it uses less digits than its factorization.

64405338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6589.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 64405338 is about 8025.2936394876. The cubic root of 64405338 is about 400.8426776559.

The spelling of 64405338 in words is "sixty-four million, four hundred five thousand, three hundred thirty-eight".