78455286 has 96 divisors (see below), whose sum is σ = 211131648. Its totient is φ = 20502720.

The previous prime is 78455269. The next prime is 78455291. The reversal of 78455286 is 68255487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345505 + ... + 345731.

It is an arithmetic number, because the mean of its divisors is an integer number (2199288).

Almost surely, 2^78455286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78455286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105565824).

78455286 is an abundant number, since it is smaller than the sum of its proper divisors (132676362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78455286 is a wasteful number, since it uses less digits than its factorization.

78455286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 463 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 78455286 is about 8857.4988569009. The cubic root of 78455286 is about 428.0955728864.

It can be divided in two parts, 7845 and 5286, that added together give a palindrome (13131).

The spelling of 78455286 in words is "seventy-eight million, four hundred fifty-five thousand, two hundred eighty-six".