78330255 has 16 divisors (see below), whose sum is σ = 131925120. Its totient is φ = 39577248.

The previous prime is 78330251. The next prime is 78330269. The reversal of 78330255 is 55203387.

It is not a de Polignac number, because 78330255 - 2² = 78330251 is a prime.

It is a super-3 number, since 3×78330255³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78330251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137137 + ... + 137706.

It is an arithmetic number, because the mean of its divisors is an integer number (8245320).

Almost surely, 2^78330255 is an apocalyptic number.

78330255 is a deficient number, since it is larger than the sum of its proper divisors (53594865).

78330255 is a wasteful number, since it uses less digits than its factorization.

78330255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274870.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 78330255 is about 8850.4381247484. The cubic root of 78330255 is about 427.8680391358.

The spelling of 78330255 in words is "seventy-eight million, three hundred thirty thousand, two hundred fifty-five".