64718838 has 20 divisors (see below), whose sum is σ = 145018500. Its totient is φ = 21572892.

The previous prime is 64718833. The next prime is 64718839. The reversal of 64718838 is 83881746.

It is a junction number, because it is equal to n+sod(n) for n = 64718793 and 64718802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64718831) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 199588 + ... + 199911.

It is an arithmetic number, because the mean of its divisors is an integer number (7250925).

Almost surely, 2^64718838 is an apocalyptic number.

64718838 is an abundant number, since it is smaller than the sum of its proper divisors (80299662).

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

64718838 is a wasteful number, since it uses less digits than its factorization.

64718838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399513 (or 399504 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 64718838 is about 8044.8019242241. The cubic root of 64718838 is about 401.4920070347.

It can be divided in two parts, 64718 and 838, that added together give a palindrome (65556).

The spelling of 64718838 in words is "sixty-four million, seven hundred eighteen thousand, eight hundred thirty-eight".