857945078 has 8 divisors (see below), whose sum is σ = 1308729960. Its totient is φ = 421701760.

The previous prime is 857945063. The next prime is 857945083. The reversal of 857945078 is 870549758.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3635243 + ... + 3635478.

It is an arithmetic number, because the mean of its divisors is an integer number (163591245).

Almost surely, 2^857945078 is an apocalyptic number.

857945078 is a deficient number, since it is larger than the sum of its proper divisors (450784882).

857945078 is a wasteful number, since it uses less digits than its factorization.

857945078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270782.

The product of its (nonzero) digits is 2822400, while the sum is 53.

The square root of 857945078 is about 29290.6995136682. The cubic root of 857945078 is about 950.2105084751.

The spelling of 857945078 in words is "eight hundred fifty-seven million, nine hundred forty-five thousand, seventy-eight".