778598 has 4 divisors (see below), whose sum is σ = 1167900. Its totient is φ = 389298.

The previous prime is 778597. The next prime is 778633. The reversal of 778598 is 895877.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 895877 = 433 ⋅2069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194648 + ... + 194651.

It is an arithmetic number, because the mean of its divisors is an integer number (291975).

2⁷⁷⁸⁵⁹⁸ is an apocalyptic number.

778598 is a deficient number, since it is larger than the sum of its proper divisors (389302).

778598 is a wasteful number, since it uses less digits than its factorization.

778598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389301.

The product of its digits is 141120, while the sum is 44.

The square root of 778598 is about 882.3820034430. The cubic root of 778598 is about 91.9964554400.

The spelling of 778598 in words is "seven hundred seventy-eight thousand, five hundred ninety-eight".