857080040 has 32 divisors (see below), whose sum is σ = 1929276360. Its totient is φ = 342681600.

The previous prime is 857080039. The next prime is 857080043. The reversal of 857080040 is 40080758.

It can be written as a sum of positive squares in 4 ways, for example, as 652189444 + 204890596 = 25538^2 + 14314^2 .

It is a junction number, because it is equal to n+sod(n) for n = 857079979 and 857080006.

It is not an unprimeable number, because it can be changed into a prime (857080043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152480 + ... + 158000.

Almost surely, 2^857080040 is an apocalyptic number.

It is an amenable number.

857080040 is an abundant number, since it is smaller than the sum of its proper divisors (1072196320).

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

857080040 is a wasteful number, since it uses less digits than its factorization.

857080040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413 (or 9409 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 857080040 is about 29275.9293618495. The cubic root of 857080040 is about 949.8910456764.

The spelling of 857080040 in words is "eight hundred fifty-seven million, eighty thousand, forty".