857221446 has 16 divisors (see below), whose sum is σ = 1721803824. Its totient is φ = 284513664.

The previous prime is 857221369. The next prime is 857221451. The reversal of 857221446 is 644122758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305191 + ... + 307986.

It is an arithmetic number, because the mean of its divisors is an integer number (107612739).

Almost surely, 2^857221446 is an apocalyptic number.

857221446 is an abundant number, since it is smaller than the sum of its proper divisors (864582378).

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

857221446 is a wasteful number, since it uses less digits than its factorization.

857221446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613415.

The product of its digits is 107520, while the sum is 39.

The square root of 857221446 is about 29278.3443179426. The cubic root of 857221446 is about 949.9432823018.

The spelling of 857221446 in words is "eight hundred fifty-seven million, two hundred twenty-one thousand, four hundred forty-six".