779381340 has 96 divisors (see below), whose sum is σ = 2220099840. Its totient is φ = 204266496.

The previous prime is 779381333. The next prime is 779381353. The reversal of 779381340 is 43183977.

It is a junction number, because it is equal to n+sod(n) for n = 779381292 and 779381301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 942007 + ... + 942833.

It is an arithmetic number, because the mean of its divisors is an integer number (23126040).

Almost surely, 2^779381340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 779381340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110049920).

779381340 is an abundant number, since it is smaller than the sum of its proper divisors (1440718500).

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

779381340 is a wasteful number, since it uses less digits than its factorization.

779381340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 779381340 is about 27917.4020997657. The cubic root of 779381340 is about 920.2729735033.

The spelling of 779381340 in words is "seven hundred seventy-nine million, three hundred eighty-one thousand, three hundred forty".