78182226 has 64 divisors (see below), whose sum is σ = 184329600. Its totient is φ = 24494400.

The previous prime is 78182149. The next prime is 78182243. The reversal of 78182226 is 62228187.

It is a happy number.

It is a super-2 number, since 2×78182226² = 12224920924630152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185496 + ... + 185916.

It is an arithmetic number, because the mean of its divisors is an integer number (2880150).

Almost surely, 2^78182226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78182226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92164800).

78182226 is an abundant number, since it is smaller than the sum of its proper divisors (106147374).

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

78182226 is a wasteful number, since it uses less digits than its factorization.

78182226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 626 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 78182226 is about 8842.0713636568. The cubic root of 78182226 is about 427.5983399497.

The spelling of 78182226 in words is "seventy-eight million, one hundred eighty-two thousand, two hundred twenty-six".