82978274 has 8 divisors (see below), whose sum is σ = 125363280. Its totient is φ = 41190516.

The previous prime is 82978271. The next prime is 82978277. The reversal of 82978274 is 47287928.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82978271) and next prime (82978277).

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

It is not an unprimeable number, because it can be changed into a prime (82978271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148964 + ... + 149519.

It is an arithmetic number, because the mean of its divisors is an integer number (15670410).

Almost surely, 2^82978274 is an apocalyptic number.

82978274 is a deficient number, since it is larger than the sum of its proper divisors (42385006).

82978274 is a wasteful number, since it uses less digits than its factorization.

82978274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298624.

The product of its digits is 451584, while the sum is 47.

The square root of 82978274 is about 9109.2411319495. The cubic root of 82978274 is about 436.1690034436.

The spelling of 82978274 in words is "eighty-two million, nine hundred seventy-eight thousand, two hundred seventy-four".