217893397038 has 8 divisors (see below), whose sum is σ = 435786794088. Its totient is φ = 72631132344.

The previous prime is 217893397027. The next prime is 217893397049. The reversal of 217893397038 is 830793398712.

It is an interprime number because it is at equal distance from previous prime (217893397027) and next prime (217893397049).

It is a sphenic number, since it is the product of 3 distinct primes.

217893397038 is an admirable number.

It is a congruent number.

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, 18157783081 + ... + 18157783092.

It is an arithmetic number, because the mean of its divisors is an integer number (54473349261).

Almost surely, 2^217893397038 is an apocalyptic number.

217893397038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

217893397038 is a wasteful number, since it uses less digits than its factorization.

217893397038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36315566178.

The product of its (nonzero) digits is 13716864, while the sum is 60.

The spelling of 217893397038 in words is "two hundred seventeen billion, eight hundred ninety-three million, three hundred ninety-seven thousand, thirty-eight".