871940394 has 24 divisors (see below), whose sum is σ = 2034528132. Its totient is φ = 268289280.

The previous prime is 871940393. The next prime is 871940417. The reversal of 871940394 is 493049178.

871940394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 624350169 + 247590225 = 24987^2 + 15735^2 .

It is not an unprimeable number, because it can be changed into a prime (871940393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1862887 + ... + 1863354.

Almost surely, 2^871940394 is an apocalyptic number.

871940394 is an abundant number, since it is smaller than the sum of its proper divisors (1162587738).

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

871940394 is a wasteful number, since it uses less digits than its factorization.

871940394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3726262 (or 3726259 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 871940394 is about 29528.6368462887. The cubic root of 871940394 is about 955.3494674167.

The spelling of 871940394 in words is "eight hundred seventy-one million, nine hundred forty thousand, three hundred ninety-four".