478779 has 12 divisors (see below), whose sum is σ = 742824. Its totient is φ = 273504.

The previous prime is 478769. The next prime is 478787. The reversal of 478779 is 977874.

It is not a de Polignac number, because 478779 - 2⁴ = 478763 is a prime.

It is an Ulam number.

478779 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 478779.

It is not an unprimeable number, because it can be changed into a prime (478729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1482 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (61902).

2⁴⁷⁸⁷⁷⁹ is an apocalyptic number.

478779 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

478779 is a deficient number, since it is larger than the sum of its proper divisors (264045).

478779 is a wasteful number, since it uses less digits than its factorization.

478779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274 (or 3267 counting only the distinct ones).

The product of its digits is 98784, while the sum is 42.

The square root of 478779 is about 691.9385810894. The cubic root of 478779 is about 78.2309068204.

The spelling of 478779 in words is "four hundred seventy-eight thousand, seven hundred seventy-nine".