218974870 has 32 divisors (see below), whose sum is σ = 398973600. Its totient is φ = 86526720.

The previous prime is 218974859. The next prime is 218974879. The reversal of 218974870 is 78479812.

It is a self number, because there is not a number n which added to its sum of digits gives 218974870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218974879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418429 + ... + 418951.

It is an arithmetic number, because the mean of its divisors is an integer number (12467925).

Almost surely, 2^218974870 is an apocalyptic number.

218974870 is a deficient number, since it is larger than the sum of its proper divisors (179998730).

218974870 is a wasteful number, since it uses less digits than its factorization.

218974870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 218974870 is about 14797.7994985741. The cubic root of 218974870 is about 602.7419596006.

The spelling of 218974870 in words is "two hundred eighteen million, nine hundred seventy-four thousand, eight hundred seventy".