859438930840 has 64 divisors (see below), whose sum is σ = 2261380872960. Its totient is φ = 287812103040.

The previous prime is 859438930837. The next prime is 859438930921. The reversal of 859438930840 is 48039834958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35678946 + ... + 35703025.

It is an arithmetic number, because the mean of its divisors is an integer number (35334076140).

Almost surely, 2^859438930840 is an apocalyptic number.

It is an amenable number.

859438930840 is an abundant number, since it is smaller than the sum of its proper divisors (1401941942120).

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

859438930840 is a wasteful number, since it uses less digits than its factorization.

859438930840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71382032 (or 71382028 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 859438930840 in words is "eight hundred fifty-nine billion, four hundred thirty-eight million, nine hundred thirty thousand, eight hundred forty".