78938111 has 8 divisors (see below), whose sum is σ = 90904704. Its totient is φ = 67143960.

The previous prime is 78938107. The next prime is 78938137. The reversal of 78938111 is 11183987.

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

It is a cyclic number.

It is not a de Polignac number, because 78938111 - 2² = 78938107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78938011) 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, 42125 + ... + 43958.

It is an arithmetic number, because the mean of its divisors is an integer number (11363088).

Almost surely, 2^78938111 is an apocalyptic number.

78938111 is a deficient number, since it is larger than the sum of its proper divisors (11966593).

78938111 is a wasteful number, since it uses less digits than its factorization.

78938111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86221.

The product of its digits is 12096, while the sum is 38.

The square root of 78938111 is about 8884.7122069316. The cubic root of 78938111 is about 428.9719645595.

The spelling of 78938111 in words is "seventy-eight million, nine hundred thirty-eight thousand, one hundred eleven".