861365394 has 16 divisors (see below), whose sum is σ = 1914145440. Its totient is φ = 287121780.

The previous prime is 861365389. The next prime is 861365419. The reversal of 861365394 is 493563168.

861365394 is a `hidden beast` number, since 86 + 1 + 36 + 539 + 4 = 666.

861365394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7975552 + ... + 7975659.

It is an arithmetic number, because the mean of its divisors is an integer number (119634090).

Almost surely, 2^861365394 is an apocalyptic number.

861365394 is an abundant number, since it is smaller than the sum of its proper divisors (1052780046).

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

861365394 is a wasteful number, since it uses less digits than its factorization.

861365394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15951222 (or 15951216 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 861365394 is about 29349.0271389019. The cubic root of 861365394 is about 951.4715491270.

The spelling of 861365394 in words is "eight hundred sixty-one million, three hundred sixty-five thousand, three hundred ninety-four".