823044378 has 32 divisors (see below), whose sum is σ = 1774313856. Its totient is φ = 253015488.

The previous prime is 823044377. The next prime is 823044407. The reversal of 823044378 is 873440328.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (823044371) 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 15 ways as a sum of consecutive naturals, for example, 95475 + ... + 103737.

It is an arithmetic number, because the mean of its divisors is an integer number (55447308).

Almost surely, 2^823044378 is an apocalyptic number.

823044378 is an abundant number, since it is smaller than the sum of its proper divisors (951269478).

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

823044378 is a wasteful number, since it uses less digits than its factorization.

823044378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 823044378 is about 28688.7500250534. The cubic root of 823044378 is about 937.1470682896.

The spelling of 823044378 in words is "eight hundred twenty-three million, forty-four thousand, three hundred seventy-eight".