778479 has 8 divisors (see below), whose sum is σ = 1117872. Its totient is φ = 479040.

The previous prime is 778469. The next prime is 778507. The reversal of 778479 is 974877.

778479 is nontrivially palindromic in base 12.

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

It is not a de Polignac number, because 778479 - 2⁸ = 778223 is a prime.

778479 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 778479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778409) 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, 9942 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (139734).

2⁷⁷⁸⁴⁷⁹ is an apocalyptic number.

778479 is a deficient number, since it is larger than the sum of its proper divisors (339393).

778479 is a wasteful number, since it uses less digits than its factorization.

778479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19977.

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

The square root of 778479 is about 882.3145697539. The cubic root of 778479 is about 91.9917683246.

The spelling of 778479 in words is "seven hundred seventy-eight thousand, four hundred seventy-nine".