64436218 has 32 divisors (see below), whose sum is σ = 121056768. Its totient is φ = 24990000.

The previous prime is 64436213. The next prime is 64436221. The reversal of 64436218 is 81263446.

It is not an unprimeable number, because it can be changed into a prime (64436213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37821 + ... + 39487.

It is an arithmetic number, because the mean of its divisors is an integer number (3783024).

Almost surely, 2^64436218 is an apocalyptic number.

64436218 is a deficient number, since it is larger than the sum of its proper divisors (56620550).

64436218 is a wasteful number, since it uses less digits than its factorization.

64436218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938.

The product of its digits is 27648, while the sum is 34.

The square root of 64436218 is about 8027.2173260726. The cubic root of 64436218 is about 400.9067305462.

The spelling of 64436218 in words is "sixty-four million, four hundred thirty-six thousand, two hundred eighteen".