857021394 has 8 divisors (see below), whose sum is σ = 1714042800. Its totient is φ = 285673796.

The previous prime is 857021383. The next prime is 857021419. The reversal of 857021394 is 493120758.

857021394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

857021394 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71418444 + ... + 71418455.

It is an arithmetic number, because the mean of its divisors is an integer number (214255350).

Almost surely, 2^857021394 is an apocalyptic number.

857021394 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.

857021394 is a wasteful number, since it uses less digits than its factorization.

857021394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142836904.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 857021394 is about 29274.9277368878. The cubic root of 857021394 is about 949.8693796404.

The spelling of 857021394 in words is "eight hundred fifty-seven million, twenty-one thousand, three hundred ninety-four".