64228287 has 4 divisors (see below), whose sum is σ = 85637720. Its totient is φ = 42818856.

The previous prime is 64228169. The next prime is 64228309. The reversal of 64228287 is 78282246.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64228287 - 2¹⁰ = 64227263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64228487) 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, 10704712 + ... + 10704717.

It is an arithmetic number, because the mean of its divisors is an integer number (21409430).

Almost surely, 2^64228287 is an apocalyptic number.

64228287 is a deficient number, since it is larger than the sum of its proper divisors (21409433).

64228287 is a wasteful number, since it uses less digits than its factorization.

64228287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21409432.

The product of its digits is 86016, while the sum is 39.

The square root of 64228287 is about 8014.2552367641. The cubic root of 64228287 is about 400.4750335512.

The spelling of 64228287 in words is "sixty-four million, two hundred twenty-eight thousand, two hundred eighty-seven".