2178874858 has 4 divisors (see below), whose sum is σ = 3268312290. Its totient is φ = 1089437428.

The previous prime is 2178874787. The next prime is 2178874861. The reversal of 2178874858 is 8584788712.

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

It can be written as a sum of positive squares in only one way, i.e., 2162529009 + 16345849 = 46503^2 + 4043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544718713 + ... + 544718716.

Almost surely, 2^2178874858 is an apocalyptic number.

2178874858 is a deficient number, since it is larger than the sum of its proper divisors (1089437432).

2178874858 is a wasteful number, since it uses less digits than its factorization.

2178874858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089437431.

The product of its digits is 8028160, while the sum is 58.

The square root of 2178874858 is about 46678.4196176349. The cubic root of 2178874858 is about 1296.4151448605.

The spelling of 2178874858 in words is "two billion, one hundred seventy-eight million, eight hundred seventy-four thousand, eight hundred fifty-eight".