698778 has 12 divisors (see below), whose sum is σ = 1514058. Its totient is φ = 232920.

The previous prime is 698773. The next prime is 698779. The reversal of 698778 is 877896.

698778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 567009 + 131769 = 753^2 + 363^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698778.

It is not an unprimeable number, because it can be changed into a prime (698773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19393 + ... + 19428.

2⁶⁹⁸⁷⁷⁸ is an apocalyptic number.

698778 is an abundant number, since it is smaller than the sum of its proper divisors (815280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698778 is a wasteful number, since it uses less digits than its factorization.

698778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38829 (or 38826 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 698778 is about 835.9294228582. The cubic root of 698778 is about 88.7387025228.

The spelling of 698778 in words is "six hundred ninety-eight thousand, seven hundred seventy-eight".