478615 has 4 divisors (see below), whose sum is σ = 574344. Its totient is φ = 382888.

The previous prime is 478603. The next prime is 478627. The reversal of 478615 is 516874.

478615 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 516874 = 2 ⋅258437.

It is an interprime number because it is at equal distance from previous prime (478603) and next prime (478627).

It is a cyclic number.

It is not a de Polignac number, because 478615 - 2¹⁵ = 445847 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

478615 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47857 + ... + 47866.

It is an arithmetic number, because the mean of its divisors is an integer number (143586).

2⁴⁷⁸⁶¹⁵ is an apocalyptic number.

478615 is a deficient number, since it is larger than the sum of its proper divisors (95729).

478615 is an equidigital number, since it uses as much as digits as its factorization.

478615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95728.

The product of its digits is 6720, while the sum is 31.

The square root of 478615 is about 691.8200633113. The cubic root of 478615 is about 78.2219734476.

The spelling of 478615 in words is "four hundred seventy-eight thousand, six hundred fifteen".