859343940 has 288 divisors, whose sum is σ = 3349172736. Its totient is φ = 173352960.

The previous prime is 859343939. The next prime is 859343959. The reversal of 859343940 is 49343958.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 375600 + ... + 377880.

It is an arithmetic number, because the mean of its divisors is an integer number (11629072).

Almost surely, 2^859343940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 859343940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1674586368).

859343940 is an abundant number, since it is smaller than the sum of its proper divisors (2489828796).

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

859343940 is a wasteful number, since it uses less digits than its factorization.

859343940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 859343940 is about 29314.5687329696. The cubic root of 859343940 is about 950.7266610205.

The spelling of 859343940 in words is "eight hundred fifty-nine million, three hundred forty-three thousand, nine hundred forty".