78286842 has 48 divisors (see below), whose sum is σ = 176047872. Its totient is φ = 25116480.

The previous prime is 78286841. The next prime is 78286847. The reversal of 78286842 is 24868287.

It is a happy number.

It is a super-2 number, since 2×78286842² = 12257659260665928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78286841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171078 + ... + 171534.

It is an arithmetic number, because the mean of its divisors is an integer number (3667664).

Almost surely, 2^78286842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78286842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88023936).

78286842 is an abundant number, since it is smaller than the sum of its proper divisors (97761030).

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

78286842 is a wasteful number, since it uses less digits than its factorization.

78286842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 800 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 78286842 is about 8847.9851943818. The cubic root of 78286842 is about 427.7889787188.

The spelling of 78286842 in words is "seventy-eight million, two hundred eighty-six thousand, eight hundred forty-two".