857806480 has 40 divisors (see below), whose sum is σ = 1995622272. Its totient is φ = 342912384.

The previous prime is 857806463. The next prime is 857806493. The reversal of 857806480 is 84608758.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 857806480.

It is an unprimeable number.

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, 240067 + ... + 243613.

Almost surely, 2^857806480 is an apocalyptic number.

857806480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

857806480 is an abundant number, since it is smaller than the sum of its proper divisors (1137815792).

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

857806480 is a wasteful number, since it uses less digits than its factorization.

857806480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6583 (or 6577 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 857806480 is about 29288.3335135340. Note that the first 3 decimals coincide. The cubic root of 857806480 is about 950.1593380013.

The spelling of 857806480 in words is "eight hundred fifty-seven million, eight hundred six thousand, four hundred eighty".