82778696 has 64 divisors (see below), whose sum is σ = 208414080. Its totient is φ = 29767680.

The previous prime is 82778693. The next prime is 82778699. The reversal of 82778696 is 69687728.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82778693) and next prime (82778699).

It is a super-2 number, since 2×82778696² = 13704625022920832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82778693) 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 15 ways as a sum of consecutive naturals, for example, 2840 + ... + 13176.

It is an arithmetic number, because the mean of its divisors is an integer number (3256470).

Almost surely, 2^82778696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82778696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104207040).

82778696 is an abundant number, since it is smaller than the sum of its proper divisors (125635384).

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

82778696 is a wasteful number, since it uses less digits than its factorization.

82778696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10374 (or 10370 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 82778696 is about 9098.2798374198. The cubic root of 82778696 is about 435.8190338400.

The spelling of 82778696 in words is "eighty-two million, seven hundred seventy-eight thousand, six hundred ninety-six".