218899742 has 12 divisors (see below), whose sum is σ = 339122016. Its totient is φ = 105862860.

The previous prime is 218899739. The next prime is 218899777. The reversal of 218899742 is 247998812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115559 + ... + 117437.

It is an arithmetic number, because the mean of its divisors is an integer number (28260168).

Almost surely, 2^218899742 is an apocalyptic number.

218899742 is a deficient number, since it is larger than the sum of its proper divisors (120222274).

218899742 is an frugal number, since it uses more digits than its factorization.

218899742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791 (or 1912 counting only the distinct ones).

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

The square root of 218899742 is about 14795.2607952682. The cubic root of 218899742 is about 602.6730202171.

The spelling of 218899742 in words is "two hundred eighteen million, eight hundred ninety-nine thousand, seven hundred forty-two".