823780806 has 16 divisors (see below), whose sum is σ = 1651594800. Its totient is φ = 273921408.

The previous prime is 823780787. The next prime is 823780807. The reversal of 823780806 is 608087328.

823780806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×823780806² = 1357229632668019272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823780807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165391 + ... + 170298.

It is an arithmetic number, because the mean of its divisors is an integer number (103224675).

Almost surely, 2^823780806 is an apocalyptic number.

823780806 is an abundant number, since it is smaller than the sum of its proper divisors (827813994).

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

823780806 is a wasteful number, since it uses less digits than its factorization.

823780806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336103.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 823780806 is about 28701.5819424644. The cubic root of 823780806 is about 937.4264925121.

The spelling of 823780806 in words is "eight hundred twenty-three million, seven hundred eighty thousand, eight hundred six".