64871538 has 8 divisors (see below), whose sum is σ = 129743088. Its totient is φ = 21623844.

The previous prime is 64871537. The next prime is 64871581. The reversal of 64871538 is 83517846.

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

64871538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 64871538.

It is not an unprimeable number, because it can be changed into a prime (64871537) 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 3 ways as a sum of consecutive naturals, for example, 5405956 + ... + 5405967.

It is an arithmetic number, because the mean of its divisors is an integer number (16217886).

Almost surely, 2^64871538 is an apocalyptic number.

64871538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64871538 is a wasteful number, since it uses less digits than its factorization.

64871538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811928.

The product of its digits is 161280, while the sum is 42.

The square root of 64871538 is about 8054.2869330562. The cubic root of 64871538 is about 401.8075240061.

The spelling of 64871538 in words is "sixty-four million, eight hundred seventy-one thousand, five hundred thirty-eight".