80866836 has 30 divisors (see below), whose sum is σ = 211402730. Its totient is φ = 26955504.

The previous prime is 80866823. The next prime is 80866843. The reversal of 80866836 is 63866808.

It can be written as a sum of positive squares in only one way, i.e., 65610000 + 15256836 = 8100^2 + 3906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80866791 and 80866800.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 124471 + ... + 125118.

Almost surely, 2^80866836 is an apocalyptic number.

It is an amenable number.

80866836 is an abundant number, since it is smaller than the sum of its proper divisors (130535894).

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

80866836 is a wasteful number, since it uses less digits than its factorization.

80866836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249605 (or 249594 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 80866836 is about 8992.5989569201. The cubic root of 80866836 is about 432.4376352101.

The spelling of 80866836 in words is "eighty million, eight hundred sixty-six thousand, eight hundred thirty-six".