82866788 has 6 divisors (see below), whose sum is σ = 145016886. Its totient is φ = 41433392.

The previous prime is 82866787. The next prime is 82866803. The reversal of 82866788 is 88766828.

It can be written as a sum of positive squares in only one way, i.e., 80856064 + 2010724 = 8992^2 + 1418^2 .

It is not an unprimeable number, because it can be changed into a prime (82866787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10358345 + ... + 10358352.

It is an arithmetic number, because the mean of its divisors is an integer number (24169481).

Almost surely, 2^82866788 is an apocalyptic number.

It is an amenable number.

82866788 is a deficient number, since it is larger than the sum of its proper divisors (62150098).

82866788 is a wasteful number, since it uses less digits than its factorization.

82866788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20716701 (or 20716699 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 53.

The square root of 82866788 is about 9103.1196850311. The cubic root of 82866788 is about 435.9735766609.

The spelling of 82866788 in words is "eighty-two million, eight hundred sixty-six thousand, seven hundred eighty-eight".