78227238 has 16 divisors (see below), whose sum is σ = 158598576. Its totient is φ = 25718400.

The previous prime is 78227231. The next prime is 78227249. The reversal of 78227238 is 83272287.

It is a super-2 number, since 2×78227238² = 12239001530217288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78227196 and 78227205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78227231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88863 + ... + 89738.

It is an arithmetic number, because the mean of its divisors is an integer number (9912411).

Almost surely, 2^78227238 is an apocalyptic number.

78227238 is an abundant number, since it is smaller than the sum of its proper divisors (80371338).

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

78227238 is a wasteful number, since it uses less digits than its factorization.

78227238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178679.

The product of its digits is 75264, while the sum is 39.

The square root of 78227238 is about 8844.6163285922. The cubic root of 78227238 is about 427.6803848719.

The spelling of 78227238 in words is "seventy-eight million, two hundred twenty-seven thousand, two hundred thirty-eight".