859865496 has 128 divisors (see below), whose sum is σ = 2582638080. Its totient is φ = 233404416.

The previous prime is 859865443. The next prime is 859865497. The reversal of 859865496 is 694568958.

It is a super-2 number, since 2×859865496² = 1478737342422652032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859865497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265680 + ... + 268896.

It is an arithmetic number, because the mean of its divisors is an integer number (20176860).

Almost surely, 2^859865496 is an apocalyptic number.

859865496 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 859865496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291319040).

859865496 is an abundant number, since it is smaller than the sum of its proper divisors (1722772584).

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

859865496 is a wasteful number, since it uses less digits than its factorization.

859865496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313 (or 3309 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 60.

The square root of 859865496 is about 29323.4632333904. The cubic root of 859865496 is about 950.9189615610.

The spelling of 859865496 in words is "eight hundred fifty-nine million, eight hundred sixty-five thousand, four hundred ninety-six".