64830857 has 8 divisors (see below), whose sum is σ = 79791936. Its totient is φ = 51294672.

The previous prime is 64830847. The next prime is 64830923. The reversal of 64830857 is 75803846.

It is a happy number.

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

It is not a de Polignac number, because 64830857 - 2⁴ = 64830841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64830847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356123 + ... + 356304.

It is an arithmetic number, because the mean of its divisors is an integer number (9973992).

Almost surely, 2^64830857 is an apocalyptic number.

It is an amenable number.

64830857 is a deficient number, since it is larger than the sum of its proper divisors (14961079).

64830857 is a wasteful number, since it uses less digits than its factorization.

64830857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712447.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 64830857 is about 8051.7611117072. The cubic root of 64830857 is about 401.7235151560.

The spelling of 64830857 in words is "sixty-four million, eight hundred thirty thousand, eight hundred fifty-seven".