64858 has 4 divisors (see below), whose sum is σ = 97290. Its totient is φ = 32428.

The previous prime is 64853. The next prime is 64871. The reversal of 64858 is 85846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85846 = 2 ⋅42923.

It can be written as a sum of positive squares in only one way, i.e., 49729 + 15129 = 223^2 + 123^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (64853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16213 + ... + 16216.

2⁶⁴⁸⁵⁸ is an apocalyptic number.

64858 is a deficient number, since it is larger than the sum of its proper divisors (32432).

64858 is a wasteful number, since it uses less digits than its factorization.

64858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32431.

The product of its digits is 7680, while the sum is 31.

The square root of 64858 is about 254.6723385058. The cubic root of 64858 is about 40.1779571076.

The spelling of 64858 in words is "sixty-four thousand, eight hundred fifty-eight".