7779798 has 24 divisors (see below), whose sum is σ = 18153408. Its totient is φ = 2393712.

The previous prime is 7779787. The next prime is 7779809. The reversal of 7779798 is 8979777.

It is an interprime number because it is at equal distance from previous prime (7779787) and next prime (7779809).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16390 + ... + 16857.

It is an arithmetic number, because the mean of its divisors is an integer number (756392).

Almost surely, 2^7779798 is an apocalyptic number.

7779798 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7779798 is an abundant number, since it is smaller than the sum of its proper divisors (10373610).

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

7779798 is a wasteful number, since it uses less digits than its factorization.

7779798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33268 (or 33265 counting only the distinct ones).

The product of its digits is 1555848, while the sum is 54.

The square root of 7779798 is about 2789.2289257069. The cubic root of 7779798 is about 198.1478846212.

The spelling of 7779798 in words is "seven million, seven hundred seventy-nine thousand, seven hundred ninety-eight".