217930382628 has 48 divisors (see below), whose sum is σ = 581674813440. Its totient is φ = 62209345824.

The previous prime is 217930382569. The next prime is 217930382629. The reversal of 217930382628 is 826283039712.

It is not an unprimeable number, because it can be changed into a prime (217930382629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1083418 + ... + 1268721.

It is an arithmetic number, because the mean of its divisors is an integer number (12118225280).

Almost surely, 2^217930382628 is an apocalyptic number.

217930382628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

217930382628 is an abundant number, since it is smaller than the sum of its proper divisors (363744430812).

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

217930382628 is a wasteful number, since it uses less digits than its factorization.

217930382628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353256 (or 2353254 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 217930382628 in words is "two hundred seventeen billion, nine hundred thirty million, three hundred eighty-two thousand, six hundred twenty-eight".