78228308 has 12 divisors (see below), whose sum is σ = 137019540. Its totient is φ = 39079872.

The previous prime is 78228239. The next prime is 78228331. The reversal of 78228308 is 80382287.

It can be written as a sum of positive squares in 2 ways, for example, as 72216004 + 6012304 = 8498^2 + 2452^2 .

It is a super-2 number, since 2×78228308² = 12239336345085728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3041 + ... + 12872.

It is an arithmetic number, because the mean of its divisors is an integer number (11418295).

Almost surely, 2^78228308 is an apocalyptic number.

It is an amenable number.

78228308 is a deficient number, since it is larger than the sum of its proper divisors (58791232).

78228308 is a wasteful number, since it uses less digits than its factorization.

78228308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17146 (or 17144 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 78228308 is about 8844.6768171596. The cubic root of 78228308 is about 427.6823348147.

The spelling of 78228308 in words is "seventy-eight million, two hundred twenty-eight thousand, three hundred eight".