780008823 has 12 divisors (see below), whose sum is σ = 1229104968. Its totient is φ = 472732560.

The previous prime is 780008797. The next prime is 780008839. The reversal of 780008823 is 328800087.

It is a de Polignac number, because none of the positive numbers 2^k-780008823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780008893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3939340 + ... + 3939537.

It is an arithmetic number, because the mean of its divisors is an integer number (102425414).

Almost surely, 2^780008823 is an apocalyptic number.

780008823 is a deficient number, since it is larger than the sum of its proper divisors (449096145).

780008823 is a wasteful number, since it uses less digits than its factorization.

780008823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7878894 (or 7878891 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 780008823 is about 27928.6380441295. The cubic root of 780008823 is about 920.5198790574.

The spelling of 780008823 in words is "seven hundred eighty million, eight thousand, eight hundred twenty-three".