861896498 has 16 divisors (see below), whose sum is σ = 1370356704. Its totient is φ = 405165120.

The previous prime is 861896491. The next prime is 861896543. The reversal of 861896498 is 894698168.

It is not an unprimeable number, because it can be changed into a prime (861896491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19961 + ... + 46067.

It is an arithmetic number, because the mean of its divisors is an integer number (85647294).

Almost surely, 2^861896498 is an apocalyptic number.

861896498 is a deficient number, since it is larger than the sum of its proper divisors (508460206).

861896498 is a wasteful number, since it uses less digits than its factorization.

861896498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27097.

The product of its digits is 5971968, while the sum is 59.

The square root of 861896498 is about 29358.0738128372. The cubic root of 861896498 is about 951.6670629493.

The spelling of 861896498 in words is "eight hundred sixty-one million, eight hundred ninety-six thousand, four hundred ninety-eight".