78208378 has 16 divisors (see below), whose sum is σ = 119024640. Its totient is φ = 38537856.

The previous prime is 78208373. The next prime is 78208391. The reversal of 78208378 is 87380287.

It is a super-2 number, since 2×78208378² = 12233100778781768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78208373) 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, 40458 + ... + 42346.

It is an arithmetic number, because the mean of its divisors is an integer number (7439040).

Almost surely, 2^78208378 is an apocalyptic number.

78208378 is a deficient number, since it is larger than the sum of its proper divisors (40816262).

78208378 is a wasteful number, since it uses less digits than its factorization.

78208378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 78208378 is about 8843.5500790124. The cubic root of 78208378 is about 427.6460119324.

The spelling of 78208378 in words is "seventy-eight million, two hundred eight thousand, three hundred seventy-eight".