78291226 has 16 divisors (see below), whose sum is σ = 126622944. Its totient is φ = 36090864.

The previous prime is 78291209. The next prime is 78291247. The reversal of 78291226 is 62219287.

It is a super-2 number, since 2×78291226² = 12259032137166152, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32185 + ... + 34531.

It is an arithmetic number, because the mean of its divisors is an integer number (7913934).

Almost surely, 2^78291226 is an apocalyptic number.

78291226 is a deficient number, since it is larger than the sum of its proper divisors (48331718).

78291226 is a wasteful number, since it uses less digits than its factorization.

78291226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645.

The product of its digits is 24192, while the sum is 37.

The square root of 78291226 is about 8848.2329309303. The cubic root of 78291226 is about 427.7969638490.

The spelling of 78291226 in words is "seventy-eight million, two hundred ninety-one thousand, two hundred twenty-six".