82778298 has 16 divisors (see below), whose sum is σ = 168363360. Its totient is φ = 27124976.

The previous prime is 82778273. The next prime is 82778309. The reversal of 82778298 is 89287728.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 82778298.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116565 + ... + 117272.

It is an arithmetic number, because the mean of its divisors is an integer number (10522710).

Almost surely, 2^82778298 is an apocalyptic number.

82778298 is an abundant number, since it is smaller than the sum of its proper divisors (85585062).

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

82778298 is a wasteful number, since it uses less digits than its factorization.

82778298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233901.

The product of its digits is 903168, while the sum is 51.

The square root of 82778298 is about 9098.2579651272. The cubic root of 82778298 is about 435.8183353662.

The spelling of 82778298 in words is "eighty-two million, seven hundred seventy-eight thousand, two hundred ninety-eight".