218130378 has 16 divisors (see below), whose sum is σ = 436435776. Its totient is φ = 72680960.

The previous prime is 218130371. The next prime is 218130379. The reversal of 218130378 is 873031812.

It is not an unprimeable number, because it can be changed into a prime (218130371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13450 + ... + 24842.

It is an arithmetic number, because the mean of its divisors is an integer number (27277236).

Almost surely, 2^218130378 is an apocalyptic number.

218130378 is an abundant number, since it is smaller than the sum of its proper divisors (218305398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218130378 is a wasteful number, since it uses less digits than its factorization.

218130378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14589.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 218130378 is about 14769.2375564888. The cubic root of 218130378 is about 601.9661224557.

The spelling of 218130378 in words is "two hundred eighteen million, one hundred thirty thousand, three hundred seventy-eight".