864643078 has 16 divisors (see below), whose sum is σ = 1397410560. Its totient is φ = 398871936.

The previous prime is 864643061. The next prime is 864643081. The reversal of 864643078 is 870346468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55963 + ... + 69721.

It is an arithmetic number, because the mean of its divisors is an integer number (87338160).

Almost surely, 2^864643078 is an apocalyptic number.

864643078 is a deficient number, since it is larger than the sum of its proper divisors (532767482).

864643078 is a wasteful number, since it uses less digits than its factorization.

864643078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16191.

The product of its (nonzero) digits is 774144, while the sum is 46.

The square root of 864643078 is about 29404.8138575982. The cubic root of 864643078 is about 952.6768741279.

The spelling of 864643078 in words is "eight hundred sixty-four million, six hundred forty-three thousand, seventy-eight".