857944940 has 12 divisors (see below), whose sum is σ = 1801684416. Its totient is φ = 343177968.

The previous prime is 857944907. The next prime is 857944957. The reversal of 857944940 is 49449758.

857944940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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, 21448604 + ... + 21448643.

It is an arithmetic number, because the mean of its divisors is an integer number (150140368).

Almost surely, 2^857944940 is an apocalyptic number.

It is an amenable number.

857944940 is an abundant number, since it is smaller than the sum of its proper divisors (943739476).

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

857944940 is a wasteful number, since it uses less digits than its factorization.

857944940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42897256 (or 42897254 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 857944940 is about 29290.6971579715. The cubic root of 857944940 is about 950.2104575281.

The spelling of 857944940 in words is "eight hundred fifty-seven million, nine hundred forty-four thousand, nine hundred forty".