218713028 has 12 divisors (see below), whose sum is σ = 402892560. Its totient is φ = 103600872.

The previous prime is 218713013. The next prime is 218713039. The reversal of 218713028 is 820317812.

It is a junction number, because it is equal to n+sod(n) for n = 218712985 and 218713003.

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, 1438826 + ... + 1438977.

It is an arithmetic number, because the mean of its divisors is an integer number (33574380).

Almost surely, 2^218713028 is an apocalyptic number.

It is an amenable number.

218713028 is a deficient number, since it is larger than the sum of its proper divisors (184179532).

218713028 is a wasteful number, since it uses less digits than its factorization.

218713028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877826 (or 2877824 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 218713028 is about 14788.9495232082. The cubic root of 218713028 is about 602.5016183103.

The spelling of 218713028 in words is "two hundred eighteen million, seven hundred thirteen thousand, twenty-eight".