778823472 has 40 divisors (see below), whose sum is σ = 2299384576. Its totient is φ = 222520896.

The previous prime is 778823467. The next prime is 778823473. The reversal of 778823472 is 274328877.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (778823473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1158628 + ... + 1159299.

Almost surely, 2^778823472 is an apocalyptic number.

It is an amenable number.

778823472 is an abundant number, since it is smaller than the sum of its proper divisors (1520561104).

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

778823472 is a wasteful number, since it uses less digits than its factorization.

778823472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317945 (or 2317939 counting only the distinct ones).

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

The square root of 778823472 is about 27907.4089087468. The cubic root of 778823472 is about 920.0533491432.

The spelling of 778823472 in words is "seven hundred seventy-eight million, eight hundred twenty-three thousand, four hundred seventy-two".