864686042 has 16 divisors (see below), whose sum is σ = 1415643264. Its totient is φ = 392844000.

The previous prime is 864686027. The next prime is 864686059. The reversal of 864686042 is 240686468.

It is a junction number, because it is equal to n+sod(n) for n = 864685984 and 864686002.

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, 41567 + ... + 58797.

It is an arithmetic number, because the mean of its divisors is an integer number (88477704).

Almost surely, 2^864686042 is an apocalyptic number.

864686042 is a deficient number, since it is larger than the sum of its proper divisors (550957222).

864686042 is a wasteful number, since it uses less digits than its factorization.

864686042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19525.

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 864686042 is about 29405.5444091756. The cubic root of 864686042 is about 952.6926533292.

The spelling of 864686042 in words is "eight hundred sixty-four million, six hundred eighty-six thousand, forty-two".