869812078 has 8 divisors (see below), whose sum is σ = 1314991872. Its totient is φ = 431481456.

The previous prime is 869812057. The next prime is 869812079. The reversal of 869812078 is 870218968.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869812079) 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, 1711975 + ... + 1712482.

It is an arithmetic number, because the mean of its divisors is an integer number (164373984).

Almost surely, 2^869812078 is an apocalyptic number.

869812078 is a deficient number, since it is larger than the sum of its proper divisors (445179794).

869812078 is a wasteful number, since it uses less digits than its factorization.

869812078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424586.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 869812078 is about 29492.5766592205. The cubic root of 869812078 is about 954.5715311554.

The spelling of 869812078 in words is "eight hundred sixty-nine million, eight hundred twelve thousand, seventy-eight".