865722450 has 96 divisors (see below), whose sum is σ = 2285478720. Its totient is φ = 216115200.

The previous prime is 865722439. The next prime is 865722463. The reversal of 865722450 is 54227568.

It is a junction number, because it is equal to n+sod(n) for n = 865722399 and 865722408.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 537246 + ... + 538854.

It is an arithmetic number, because the mean of its divisors is an integer number (23807070).

Almost surely, 2^865722450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865722450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142739360).

865722450 is an abundant number, since it is smaller than the sum of its proper divisors (1419756270).

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

865722450 is a wasteful number, since it uses less digits than its factorization.

865722450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 865722450 is about 29423.1617947494. The cubic root of 865722450 is about 953.0731321054.

The spelling of 865722450 in words is "eight hundred sixty-five million, seven hundred twenty-two thousand, four hundred fifty".