861214078 has 4 divisors (see below), whose sum is σ = 1291821120. Its totient is φ = 430607038.

The previous prime is 861214063. The next prime is 861214087. The reversal of 861214078 is 870412168.

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

It is a congruent number.

It is an unprimeable number.

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, 215303518 + ... + 215303521.

It is an arithmetic number, because the mean of its divisors is an integer number (322955280).

Almost surely, 2^861214078 is an apocalyptic number.

861214078 is a deficient number, since it is larger than the sum of its proper divisors (430607042).

861214078 is a wasteful number, since it uses less digits than its factorization.

861214078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430607041.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 861214078 is about 29346.4491548807. The cubic root of 861214078 is about 951.4158308835.

The spelling of 861214078 in words is "eight hundred sixty-one million, two hundred fourteen thousand, seventy-eight".