857309038 has 24 divisors (see below), whose sum is σ = 1357048728. Its totient is φ = 406131792.

The previous prime is 857309021. The next prime is 857309041. The reversal of 857309038 is 830903758.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 857308985 and 857309003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109420 + ... + 116992.

It is an arithmetic number, because the mean of its divisors is an integer number (56543697).

Almost surely, 2^857309038 is an apocalyptic number.

857309038 is a deficient number, since it is larger than the sum of its proper divisors (499739690).

857309038 is a wasteful number, since it uses less digits than its factorization.

857309038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7728 (or 7705 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 857309038 is about 29279.8401293450. The cubic root of 857309038 is about 949.9756366790.

The spelling of 857309038 in words is "eight hundred fifty-seven million, three hundred nine thousand, thirty-eight".