64239886 has 4 divisors (see below), whose sum is σ = 96359832. Its totient is φ = 32119942.

The previous prime is 64239883. The next prime is 64239919. The reversal of 64239886 is 68893246.

It is a happy number.

64239886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68893246 = 2 ⋅34446623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64239883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16059970 + ... + 16059973.

It is an arithmetic number, because the mean of its divisors is an integer number (24089958).

Almost surely, 2^64239886 is an apocalyptic number.

64239886 is a deficient number, since it is larger than the sum of its proper divisors (32119946).

64239886 is a wasteful number, since it uses less digits than its factorization.

64239886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32119945.

The product of its digits is 497664, while the sum is 46.

The square root of 64239886 is about 8014.9788521243. The cubic root of 64239886 is about 400.4991393906.

The spelling of 64239886 in words is "sixty-four million, two hundred thirty-nine thousand, eight hundred eighty-six".