868138546 has 16 divisors (see below), whose sum is σ = 1433166048. Its totient is φ = 391115200.

The previous prime is 868138543. The next prime is 868138549. The reversal of 868138546 is 645831868.

It is an interprime number because it is at equal distance from previous prime (868138543) and next prime (868138549).

It is a self number, because there is not a number n which added to its sum of digits gives 868138546.

It is not an unprimeable number, because it can be changed into a prime (868138543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172120 + ... + 177091.

It is an arithmetic number, because the mean of its divisors is an integer number (89572878).

Almost surely, 2^868138546 is an apocalyptic number.

868138546 is a deficient number, since it is larger than the sum of its proper divisors (565027502).

868138546 is a wasteful number, since it uses less digits than its factorization.

868138546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349337.

The product of its digits is 1105920, while the sum is 49.

The square root of 868138546 is about 29464.1909103237. The cubic root of 868138546 is about 953.9589346024.

It can be divided in two parts, 86813 and 8546, that added together give a palindrome (95359).

The spelling of 868138546 in words is "eight hundred sixty-eight million, one hundred thirty-eight thousand, five hundred forty-six".