864279398 has 4 divisors (see below), whose sum is σ = 1296419100. Its totient is φ = 432139698.

The previous prime is 864279397. The next prime is 864279413. The reversal of 864279398 is 893972468.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864279397) 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 as a sum of consecutive naturals, namely, 216069848 + ... + 216069851.

It is an arithmetic number, because the mean of its divisors is an integer number (324104775).

Almost surely, 2^864279398 is an apocalyptic number.

864279398 is a deficient number, since it is larger than the sum of its proper divisors (432139702).

864279398 is a wasteful number, since it uses less digits than its factorization.

864279398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432139701.

The product of its digits is 5225472, while the sum is 56.

The square root of 864279398 is about 29398.6291857291. The cubic root of 864279398 is about 952.5432860142.

The spelling of 864279398 in words is "eight hundred sixty-four million, two hundred seventy-nine thousand, three hundred ninety-eight".