478147581 has 12 divisors (see below), whose sum is σ = 692514108. Its totient is φ = 317908224.

The previous prime is 478147567. The next prime is 478147589. The reversal of 478147581 is 185741874.

It can be written as a sum of positive squares in 2 ways, for example, as 322920900 + 155226681 = 17970^2 + 12459^2 .

It is not a de Polignac number, because 478147581 - 2⁶ = 478147517 is a prime.

It is a super-2 number, since 2×478147581² = 457250218432303122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478147589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67860 + ... + 74573.

It is an arithmetic number, because the mean of its divisors is an integer number (57709509).

Almost surely, 2^478147581 is an apocalyptic number.

It is an amenable number.

478147581 is a deficient number, since it is larger than the sum of its proper divisors (214366527).

478147581 is a wasteful number, since it uses less digits than its factorization.

478147581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142812 (or 142809 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 478147581 is about 21866.5859475136. The cubic root of 478147581 is about 781.9650109824.

The spelling of 478147581 in words is "four hundred seventy-eight million, one hundred forty-seven thousand, five hundred eighty-one".