218480788 has 12 divisors (see below), whose sum is σ = 382727380. Its totient is φ = 109130112.

The previous prime is 218480783. The next prime is 218480789. The reversal of 218480788 is 887084812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20178064 + 198302724 = 4492^2 + 14082^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218480783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23031 + ... + 31102.

Almost surely, 2^218480788 is an apocalyptic number.

It is an amenable number.

218480788 is a deficient number, since it is larger than the sum of its proper divisors (164246592).

218480788 is a wasteful number, since it uses less digits than its factorization.

218480788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55146 (or 55144 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 46.

The square root of 218480788 is about 14781.0956292150. The cubic root of 218480788 is about 602.2882877302.

The spelling of 218480788 in words is "two hundred eighteen million, four hundred eighty thousand, seven hundred eighty-eight".