82785857 has 8 divisors (see below), whose sum is σ = 103213632. Its totient is φ = 64508400.

The previous prime is 82785853. The next prime is 82785877. The reversal of 82785857 is 75858728.

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

It is not a de Polignac number, because 82785857 - 2² = 82785853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82785853) 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, 537494 + ... + 537647.

It is an arithmetic number, because the mean of its divisors is an integer number (12901704).

Almost surely, 2^82785857 is an apocalyptic number.

It is an amenable number.

82785857 is a deficient number, since it is larger than the sum of its proper divisors (20427775).

82785857 is a wasteful number, since it uses less digits than its factorization.

82785857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075159.

The product of its digits is 1254400, while the sum is 50.

The square root of 82785857 is about 9098.6733648373. The cubic root of 82785857 is about 435.8316007212.

The spelling of 82785857 in words is "eighty-two million, seven hundred eighty-five thousand, eight hundred fifty-seven".