867991738 has 8 divisors (see below), whose sum is σ = 1304301888. Its totient is φ = 433224444.

The previous prime is 867991717. The next prime is 867991739. The reversal of 867991738 is 837199768.

867991738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (867991739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384306 + ... + 386557.

It is an arithmetic number, because the mean of its divisors is an integer number (163037736).

Almost surely, 2^867991738 is an apocalyptic number.

867991738 is a deficient number, since it is larger than the sum of its proper divisors (436310150).

867991738 is a wasteful number, since it uses less digits than its factorization.

867991738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771428.

The product of its digits is 4572288, while the sum is 58.

The square root of 867991738 is about 29461.6995097024. The cubic root of 867991738 is about 953.9051579715.

The spelling of 867991738 in words is "eight hundred sixty-seven million, nine hundred ninety-one thousand, seven hundred thirty-eight".