778341924 has 72 divisors (see below), whose sum is σ = 2065539840. Its totient is φ = 246801600.

The previous prime is 778341857. The next prime is 778341929. The reversal of 778341924 is 429143877.

It is a self number, because there is not a number n which added to its sum of digits gives 778341924.

It is not an unprimeable number, because it can be changed into a prime (778341929) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 59934 + ... + 71754.

Almost surely, 2^778341924 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 778341924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032769920).

778341924 is an abundant number, since it is smaller than the sum of its proper divisors (1287197916).

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

778341924 is a wasteful number, since it uses less digits than its factorization.

778341924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11921 (or 11916 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 778341924 is about 27898.7799733250. The cubic root of 778341924 is about 919.8636864831.

The spelling of 778341924 in words is "seven hundred seventy-eight million, three hundred forty-one thousand, nine hundred twenty-four".