869856456 has 64 divisors (see below), whose sum is σ = 2499753600. Its totient is φ = 247093824.

The previous prime is 869856437. The next prime is 869856467. The reversal of 869856456 is 654658968.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 869856396 and 869856405.

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, 5027986 + ... + 5028158.

It is an arithmetic number, because the mean of its divisors is an integer number (39058650).

Almost surely, 2^869856456 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 869856456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249876800).

869856456 is an abundant number, since it is smaller than the sum of its proper divisors (1629897144).

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

869856456 is an frugal number, since it uses more digits than its factorization.

869856456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 185 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 57.

The square root of 869856456 is about 29493.3290084385. The cubic root of 869856456 is about 954.5877650279.

The spelling of 869856456 in words is "eight hundred sixty-nine million, eight hundred fifty-six thousand, four hundred fifty-six".