64435216 has 20 divisors (see below), whose sum is σ = 129149100. Its totient is φ = 31106432.

The previous prime is 64435211. The next prime is 64435223. The reversal of 64435216 is 61253446.

It can be written as a sum of positive squares in 2 ways, for example, as 10265616 + 54169600 = 3204^2 + 7360^2 .

It is not an unprimeable number, because it can be changed into a prime (64435211) 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, 68971 + ... + 69898.

It is an arithmetic number, because the mean of its divisors is an integer number (6457455).

Almost surely, 2^64435216 is an apocalyptic number.

It is an amenable number.

64435216 is an abundant number, since it is smaller than the sum of its proper divisors (64713884).

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

64435216 is a wasteful number, since it uses less digits than its factorization.

64435216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138906 (or 138900 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 64435216 is about 8027.1549131682. The cubic root of 64435216 is about 400.9046524674.

The spelling of 64435216 in words is "sixty-four million, four hundred thirty-five thousand, two hundred sixteen".