863818772 has 6 divisors (see below), whose sum is σ = 1511682858. Its totient is φ = 431909384.

The previous prime is 863818727. The next prime is 863818777. The reversal of 863818772 is 277818368.

863818772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 597606916 + 266211856 = 24446^2 + 16316^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 863818772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863818777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107977343 + ... + 107977350.

It is an arithmetic number, because the mean of its divisors is an integer number (251947143).

Almost surely, 2^863818772 is an apocalyptic number.

It is an amenable number.

863818772 is a deficient number, since it is larger than the sum of its proper divisors (647864086).

863818772 is a wasteful number, since it uses less digits than its factorization.

863818772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215954697 (or 215954695 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 863818772 is about 29390.7940008432. The cubic root of 863818772 is about 952.3740335804.

The spelling of 863818772 in words is "eight hundred sixty-three million, eight hundred eighteen thousand, seven hundred seventy-two".