64860447 has 8 divisors (see below), whose sum is σ = 86693680. Its totient is φ = 43133760.

The previous prime is 64860431. The next prime is 64860449. The reversal of 64860447 is 74406846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64860447 - 2⁴ = 64860431 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 (64860449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25204 + ... + 27657.

It is an arithmetic number, because the mean of its divisors is an integer number (10836710).

Almost surely, 2^64860447 is an apocalyptic number.

64860447 is a deficient number, since it is larger than the sum of its proper divisors (21833233).

64860447 is a wasteful number, since it uses less digits than its factorization.

64860447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53273.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 64860447 is about 8053.5983882982. The cubic root of 64860447 is about 401.7846238695.

The spelling of 64860447 in words is "sixty-four million, eight hundred sixty thousand, four hundred forty-seven".