78322111 has 8 divisors (see below), whose sum is σ = 94776480. Its totient is φ = 63184128.

The previous prime is 78322103. The next prime is 78322133. The reversal of 78322111 is 11122387.

It is a happy number.

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

It is not a de Polignac number, because 78322111 - 2³ = 78322103 is a prime.

It is a super-2 number, since 2×78322111² = 12268706142992642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78320111) 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, 328966 + ... + 329203.

It is an arithmetic number, because the mean of its divisors is an integer number (11847060).

Almost surely, 2^78322111 is an apocalyptic number.

78322111 is a deficient number, since it is larger than the sum of its proper divisors (16454369).

78322111 is a wasteful number, since it uses less digits than its factorization.

78322111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658193.

The product of its digits is 672, while the sum is 25.

The square root of 78322111 is about 8849.9780225716. The cubic root of 78322111 is about 427.8532101357.

Adding to 78322111 its reverse (11122387), we get a palindrome (89444498).

The spelling of 78322111 in words is "seventy-eight million, three hundred twenty-two thousand, one hundred eleven".