864479838 has 8 divisors (see below), whose sum is σ = 1728959688. Its totient is φ = 288159944.

The previous prime is 864479831. The next prime is 864479839. The reversal of 864479838 is 838974468.

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

864479838 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864479831) 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 3 ways as a sum of consecutive naturals, for example, 72039981 + ... + 72039992.

It is an arithmetic number, because the mean of its divisors is an integer number (216119961).

Almost surely, 2^864479838 is an apocalyptic number.

864479838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

864479838 is a wasteful number, since it uses less digits than its factorization.

864479838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144079978.

The product of its digits is 9289728, while the sum is 57.

The square root of 864479838 is about 29402.0379905883. The cubic root of 864479838 is about 952.6169169176.

The spelling of 864479838 in words is "eight hundred sixty-four million, four hundred seventy-nine thousand, eight hundred thirty-eight".