82787056 has 40 divisors (see below), whose sum is σ = 179725104. Its totient is φ = 36610560.

The previous prime is 82787041. The next prime is 82787063. The reversal of 82787056 is 65078728.

It is a happy number.

It is a super-2 number, since 2×82787056² = 13707393282294272, which contains 22 as substring.

It is a congruent number.

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, 156 + ... + 12868.

Almost surely, 2^82787056 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 82787056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89862552).

82787056 is an abundant number, since it is smaller than the sum of its proper divisors (96938048).

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

82787056 is a wasteful number, since it uses less digits than its factorization.

82787056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12769 (or 12763 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 82787056 is about 9098.7392533252. The cubic root of 82787056 is about 435.8337047826.

The spelling of 82787056 in words is "eighty-two million, seven hundred eighty-seven thousand, fifty-six".