861289302 has 16 divisors (see below), whose sum is σ = 1730169792. Its totient is φ = 285831240.

The previous prime is 861289301. The next prime is 861289339. The reversal of 861289302 is 203982168.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861289301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314824 + ... + 317547.

It is an arithmetic number, because the mean of its divisors is an integer number (108135612).

Almost surely, 2^861289302 is an apocalyptic number.

861289302 is an abundant number, since it is smaller than the sum of its proper divisors (868880490).

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

861289302 is a wasteful number, since it uses less digits than its factorization.

861289302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632603.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 861289302 is about 29347.7307811013. The cubic root of 861289302 is about 951.4435310116.

The spelling of 861289302 in words is "eight hundred sixty-one million, two hundred eighty-nine thousand, three hundred two".