857420286 has 8 divisors (see below), whose sum is σ = 1714840584. Its totient is φ = 285806760.

The previous prime is 857420281. The next prime is 857420297. The reversal of 857420286 is 682024758.

It is a happy number.

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

857420286 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857420281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71451685 + ... + 71451696.

It is an arithmetic number, because the mean of its divisors is an integer number (214355073).

Almost surely, 2^857420286 is an apocalyptic number.

857420286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857420286 is a wasteful number, since it uses less digits than its factorization.

857420286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142903386.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 857420286 is about 29281.7398048682. The cubic root of 857420286 is about 950.0167258366.

The spelling of 857420286 in words is "eight hundred fifty-seven million, four hundred twenty thousand, two hundred eighty-six".