64446307 has 4 divisors (see below), whose sum is σ = 64916856. Its totient is φ = 63975760.

The previous prime is 64446289. The next prime is 64446329. The reversal of 64446307 is 70364446.

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

It is a cyclic number.

It is not a de Polignac number, because 64446307 - 2¹⁵ = 64413539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64446397) 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, 235069 + ... + 235342.

It is an arithmetic number, because the mean of its divisors is an integer number (16229214).

Almost surely, 2^64446307 is an apocalyptic number.

64446307 is a deficient number, since it is larger than the sum of its proper divisors (470549).

64446307 is a wasteful number, since it uses less digits than its factorization.

64446307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470548.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 64446307 is about 8027.8457259716. The cubic root of 64446307 is about 400.9276532356.

The spelling of 64446307 in words is "sixty-four million, four hundred forty-six thousand, three hundred seven".