218972894 has 8 divisors (see below), whose sum is σ = 375382128. Its totient is φ = 93845520.

The previous prime is 218972861. The next prime is 218972909. The reversal of 218972894 is 498279812.

218972894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 7820447 + ... + 7820474.

It is an arithmetic number, because the mean of its divisors is an integer number (46922766).

Almost surely, 2^218972894 is an apocalyptic number.

218972894 is a deficient number, since it is larger than the sum of its proper divisors (156409234).

218972894 is a wasteful number, since it uses less digits than its factorization.

218972894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15640930.

The product of its digits is 580608, while the sum is 50.

The square root of 218972894 is about 14797.7327317397. The cubic root of 218972894 is about 602.7401465741.

The spelling of 218972894 in words is "two hundred eighteen million, nine hundred seventy-two thousand, eight hundred ninety-four".