218398072 has 32 divisors (see below), whose sum is σ = 424706400. Its totient is φ = 105162624.

The previous prime is 218398067. The next prime is 218398097. The reversal of 218398072 is 270893812.

218398072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112018 + ... + 113950.

It is an arithmetic number, because the mean of its divisors is an integer number (13272075).

Almost surely, 2^218398072 is an apocalyptic number.

It is an amenable number.

218398072 is a deficient number, since it is larger than the sum of its proper divisors (206308328).

218398072 is a wasteful number, since it uses less digits than its factorization.

218398072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2451 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 218398072 is about 14778.2973308836. The cubic root of 218398072 is about 602.2122701135.

The spelling of 218398072 in words is "two hundred eighteen million, three hundred ninety-eight thousand, seventy-two".