478207681 has 8 divisors (see below), whose sum is σ = 547150464. Its totient is φ = 409421760.

The previous prime is 478207669. The next prime is 478207703. The reversal of 478207681 is 186702874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 478207681 - 2²¹ = 476110529 is a prime.

It is a super-2 number, since 2×478207681² = 457365172334795522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478207621) 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 7 ways as a sum of consecutive naturals, for example, 32605 + ... + 44938.

It is an arithmetic number, because the mean of its divisors is an integer number (68393808).

Almost surely, 2^478207681 is an apocalyptic number.

It is an amenable number.

478207681 is a deficient number, since it is larger than the sum of its proper divisors (68942783).

478207681 is an equidigital number, since it uses as much as digits as its factorization.

478207681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78431.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 478207681 is about 21867.9601472108. The cubic root of 478207681 is about 781.9977722261.

The spelling of 478207681 in words is "four hundred seventy-eight million, two hundred seven thousand, six hundred eighty-one".