779898 has 32 divisors (see below), whose sum is σ = 1843200. Its totient is φ = 215280.

The previous prime is 779887. The next prime is 779899. The reversal of 779898 is 898977.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779899) by changing a digit.

779898 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 1003 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (57600).

2⁷⁷⁹⁸⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 779898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921600).

779898 is an abundant number, since it is smaller than the sum of its proper divisors (1063302).

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

779898 is a wasteful number, since it uses less digits than its factorization.

779898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its digits is 254016, while the sum is 48.

The square root of 779898 is about 883.1183386161. The cubic root of 779898 is about 92.0476281428.

The spelling of 779898 in words is "seven hundred seventy-nine thousand, eight hundred ninety-eight".