64857958 has 36 divisors (see below), whose sum is σ = 113868756. Its totient is φ = 27472000.

The previous prime is 64857917. The next prime is 64857959. The reversal of 64857958 is 85975846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64857959) 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 17 ways as a sum of consecutive naturals, for example, 642108 + ... + 642208.

It is an arithmetic number, because the mean of its divisors is an integer number (3163021).

Almost surely, 2^64857958 is an apocalyptic number.

64857958 is a deficient number, since it is larger than the sum of its proper divisors (49010798).

64857958 is a wasteful number, since it uses less digits than its factorization.

64857958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 131 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The square root of 64857958 is about 8053.4438596168. The cubic root of 64857958 is about 401.7794843494.

The spelling of 64857958 in words is "sixty-four million, eight hundred fifty-seven thousand, nine hundred fifty-eight".