78425287 has 8 divisors (see below), whose sum is σ = 80399520. Its totient is φ = 76475520.

The previous prime is 78425261. The next prime is 78425317. The reversal of 78425287 is 78252487.

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

It is a cyclic number.

It is not a de Polignac number, because 78425287 - 2⁷ = 78425159 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 (78425227) 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, 462 + ... + 12532.

It is an arithmetic number, because the mean of its divisors is an integer number (10049940).

Almost surely, 2^78425287 is an apocalyptic number.

78425287 is a deficient number, since it is larger than the sum of its proper divisors (1974233).

78425287 is a wasteful number, since it uses less digits than its factorization.

78425287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12233.

The product of its digits is 250880, while the sum is 43.

The square root of 78425287 is about 8855.8052711202. The cubic root of 78425287 is about 428.0410022005.

The spelling of 78425287 in words is "seventy-eight million, four hundred twenty-five thousand, two hundred eighty-seven".