857224446 has 48 divisors (see below), whose sum is σ = 1896079104. Its totient is φ = 258135072.

The previous prime is 857224409. The next prime is 857224457. The reversal of 857224446 is 644422758.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 857224398 and 857224407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38665 + ... + 56651.

It is an arithmetic number, because the mean of its divisors is an integer number (39501648).

Almost surely, 2^857224446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857224446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948039552).

857224446 is an abundant number, since it is smaller than the sum of its proper divisors (1038854658).

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

857224446 is a wasteful number, since it uses less digits than its factorization.

857224446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18065 (or 18052 counting only the distinct ones).

The product of its digits is 430080, while the sum is 42.

The square root of 857224446 is about 29278.3955503030. The cubic root of 857224446 is about 949.9443904660.

The spelling of 857224446 in words is "eight hundred fifty-seven million, two hundred twenty-four thousand, four hundred forty-six".