478222857 has 12 divisors (see below), whose sum is σ = 789447360. Its totient is φ = 273270168.

The previous prime is 478222783. The next prime is 478222861. The reversal of 478222857 is 758222874.

It is not a de Polignac number, because 478222857 - 2¹² = 478218761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478222057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3795357 + ... + 3795482.

It is an arithmetic number, because the mean of its divisors is an integer number (65787280).

Almost surely, 2^478222857 is an apocalyptic number.

It is an amenable number.

478222857 is a deficient number, since it is larger than the sum of its proper divisors (311224503).

478222857 is a wasteful number, since it uses less digits than its factorization.

478222857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7590852 (or 7590849 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 478222857 is about 21868.3071361274. The cubic root of 478222857 is about 782.0060444149.

The spelling of 478222857 in words is "four hundred seventy-eight million, two hundred twenty-two thousand, eight hundred fifty-seven".