779648 has 16 divisors (see below), whose sum is σ = 1553460. Its totient is φ = 389760.

The previous prime is 779621. The next prime is 779657. The reversal of 779648 is 846977.

It is a tau number, because it is divible by the number of its divisors (16).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

779648 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2918 + ... + 3173.

2⁷⁷⁹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

779648 is a deficient number, since it is larger than the sum of its proper divisors (773812).

779648 is an equidigital number, since it uses as much as digits as its factorization.

779648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105 (or 6093 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 779648 is about 882.9767833867. The cubic root of 779648 is about 92.0377916572.

Adding to 779648 its sum of digits (41), we get a square (779689 = 883²).

The spelling of 779648 in words is "seven hundred seventy-nine thousand, six hundred forty-eight".