64438336 has 28 divisors (see below), whose sum is σ = 131998720. Its totient is φ = 31178880.

The previous prime is 64438333. The next prime is 64438343. The reversal of 64438336 is 63383446.

It is a junction number, because it is equal to n+sod(n) for n = 64438295 and 64438304.

It is not an unprimeable number, because it can be changed into a prime (64438331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14256 + ... + 18223.

It is an arithmetic number, because the mean of its divisors is an integer number (4714240).

Almost surely, 2^64438336 is an apocalyptic number.

It is an amenable number.

64438336 is an abundant number, since it is smaller than the sum of its proper divisors (67560384).

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

64438336 is a wasteful number, since it uses less digits than its factorization.

64438336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32522 (or 32512 counting only the distinct ones).

The product of its digits is 124416, while the sum is 37.

The square root of 64438336 is about 8027.3492511538. The cubic root of 64438336 is about 400.9111230612.

The spelling of 64438336 in words is "sixty-four million, four hundred thirty-eight thousand, three hundred thirty-six".