78928255 has 8 divisors (see below), whose sum is σ = 108244512. Its totient is φ = 54122208.

The previous prime is 78928243. The next prime is 78928259. The reversal of 78928255 is 55282987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78928255 - 2¹⁹ = 78403967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78928259) 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, 1127512 + ... + 1127581.

It is an arithmetic number, because the mean of its divisors is an integer number (13530564).

Almost surely, 2^78928255 is an apocalyptic number.

78928255 is a deficient number, since it is larger than the sum of its proper divisors (29316257).

78928255 is a wasteful number, since it uses less digits than its factorization.

78928255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255105.

The product of its digits is 403200, while the sum is 46.

The square root of 78928255 is about 8884.1575289951. The cubic root of 78928255 is about 428.9541103882.

The spelling of 78928255 in words is "seventy-eight million, nine hundred twenty-eight thousand, two hundred fifty-five".