478555891 has 8 divisors (see below), whose sum is σ = 536171184. Its totient is φ = 423292320.

The previous prime is 478555879. The next prime is 478555943. The reversal of 478555891 is 198555874.

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

It is not a de Polignac number, because 478555891 - 2⁹ = 478555379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478555801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587500 + ... + 588313.

It is an arithmetic number, because the mean of its divisors is an integer number (67021398).

Almost surely, 2^478555891 is an apocalyptic number.

478555891 is a deficient number, since it is larger than the sum of its proper divisors (57615293).

478555891 is a wasteful number, since it uses less digits than its factorization.

478555891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175861.

The product of its digits is 2016000, while the sum is 52.

The square root of 478555891 is about 21875.9203463534. The cubic root of 478555891 is about 782.1875317452.

The spelling of 478555891 in words is "four hundred seventy-eight million, five hundred fifty-five thousand, eight hundred ninety-one".