82679778 has 24 divisors (see below), whose sum is σ = 185775408. Its totient is φ = 27559764.

The previous prime is 82679771. The next prime is 82679797. The reversal of 82679778 is 87797628.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (82679771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84576 + ... + 85547.

It is an arithmetic number, because the mean of its divisors is an integer number (7740642).

Almost surely, 2^82679778 is an apocalyptic number.

82679778 is an abundant number, since it is smaller than the sum of its proper divisors (103095630).

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

82679778 is a wasteful number, since it uses less digits than its factorization.

82679778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170140 (or 170128 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 82679778 is about 9092.8421299394. The cubic root of 82679778 is about 435.6453678586.

The spelling of 82679778 in words is "eighty-two million, six hundred seventy-nine thousand, seven hundred seventy-eight".