864895078 has 4 divisors (see below), whose sum is σ = 1297342620. Its totient is φ = 432447538.

The previous prime is 864895063. The next prime is 864895079. The reversal of 864895078 is 870598468.

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 (864895079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216223768 + ... + 216223771.

It is an arithmetic number, because the mean of its divisors is an integer number (324335655).

Almost surely, 2^864895078 is an apocalyptic number.

864895078 is a deficient number, since it is larger than the sum of its proper divisors (432447542).

864895078 is a wasteful number, since it uses less digits than its factorization.

864895078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432447541.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 864895078 is about 29409.0985580993. The cubic root of 864895078 is about 952.7694176136.

The spelling of 864895078 in words is "eight hundred sixty-four million, eight hundred ninety-five thousand, seventy-eight".