478555 has 24 divisors (see below), whose sum is σ = 727776. Its totient is φ = 295680.

The previous prime is 478531. The next prime is 478571. The reversal of 478555 is 555874.

It is not a de Polignac number, because 478555 - 2⁵ = 478523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478555.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4179 + ... + 4291.

It is an arithmetic number, because the mean of its divisors is an integer number (30324).

2⁴⁷⁸⁵⁵⁵ is an apocalyptic number.

478555 is the 565-th pentagonal number.

478555 is a deficient number, since it is larger than the sum of its proper divisors (249221).

478555 is a wasteful number, since it uses less digits than its factorization.

478555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 136 counting only the distinct ones).

The product of its digits is 28000, while the sum is 34.

The square root of 478555 is about 691.7766980753. The cubic root of 478555 is about 78.2187046306.

It can be divided in two parts, 4785 and 55, that multiplied together give a triangular number (263175 = T₇₂₅).

The spelling of 478555 in words is "four hundred seventy-eight thousand, five hundred fifty-five".