868540390 has 16 divisors (see below), whose sum is σ = 1563948000. Its totient is φ = 347288320.

The previous prime is 868540367. The next prime is 868540391. The reversal of 868540390 is 93045868.

It is a super-2 number, since 2×868540390² = 1508724818122704200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868540391) 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, 15510 + ... + 44470.

It is an arithmetic number, because the mean of its divisors is an integer number (97746750).

Almost surely, 2^868540390 is an apocalyptic number.

868540390 is a deficient number, since it is larger than the sum of its proper divisors (695407610).

868540390 is a wasteful number, since it uses less digits than its factorization.

868540390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31967.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 868540390 is about 29471.0093142396. The cubic root of 868540390 is about 954.1061014126.

The spelling of 868540390 in words is "eight hundred sixty-eight million, five hundred forty thousand, three hundred ninety".