778740348 has 48 divisors (see below), whose sum is σ = 1922086656. Its totient is φ = 244886400.

The previous prime is 778740343. The next prime is 778740353. The reversal of 778740348 is 843047877.

It is an interprime number because it is at equal distance from previous prime (778740343) and next prime (778740353).

It is a super-2 number, since 2×778740348² = 1212873059206322208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 778740297 and 778740306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778740343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823 + ... + 39473.

It is an arithmetic number, because the mean of its divisors is an integer number (40043472).

Almost surely, 2^778740348 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 778740348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961043328).

778740348 is an abundant number, since it is smaller than the sum of its proper divisors (1143346308).

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

778740348 is a wasteful number, since it uses less digits than its factorization.

778740348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38754 (or 38752 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 48.

The square root of 778740348 is about 27905.9195870697. The cubic root of 778740348 is about 920.0206154801.

The spelling of 778740348 in words is "seven hundred seventy-eight million, seven hundred forty thousand, three hundred forty-eight".