478226781 has 16 divisors (see below), whose sum is σ = 715792000. Its totient is φ = 315529344.

The previous prime is 478226761. The next prime is 478226821. The reversal of 478226781 is 187622874.

It is not a de Polignac number, because 478226781 - 2⁷ = 478226653 is a prime.

It is a super-2 number, since 2×478226781² = 457401708131243922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478226731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88681 + ... + 93918.

It is an arithmetic number, because the mean of its divisors is an integer number (44737000).

Almost surely, 2^478226781 is an apocalyptic number.

It is an amenable number.

478226781 is a deficient number, since it is larger than the sum of its proper divisors (237565219).

478226781 is a wasteful number, since it uses less digits than its factorization.

478226781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182705 (or 182699 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 478226781 is about 21868.3968548223. The cubic root of 478226781 is about 782.0081832945.

The spelling of 478226781 in words is "four hundred seventy-eight million, two hundred twenty-six thousand, seven hundred eighty-one".