861886258 has 8 divisors (see below), whose sum is σ = 1312125552. Its totient is φ = 424511076.

The previous prime is 861886241. The next prime is 861886261. The reversal of 861886258 is 852688168.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3215860 + ... + 3216127.

It is an arithmetic number, because the mean of its divisors is an integer number (164015694).

Almost surely, 2^861886258 is an apocalyptic number.

861886258 is a deficient number, since it is larger than the sum of its proper divisors (450239294).

861886258 is a wasteful number, since it uses less digits than its factorization.

861886258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432056.

The product of its digits is 1474560, while the sum is 52.

The square root of 861886258 is about 29357.8994139567. The cubic root of 861886258 is about 951.6632940864.

The spelling of 861886258 in words is "eight hundred sixty-one million, eight hundred eighty-six thousand, two hundred fifty-eight".