80684356 has 6 divisors (see below), whose sum is σ = 141197630. Its totient is φ = 40342176.

The previous prime is 80684353. The next prime is 80684371. The reversal of 80684356 is 65348608.

It can be written as a sum of positive squares in only one way, i.e., 76842756 + 3841600 = 8766^2 + 1960^2 .

It is not an unprimeable number, because it can be changed into a prime (80684353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10085541 + ... + 10085548.

Almost surely, 2^80684356 is an apocalyptic number.

It is an amenable number.

80684356 is a deficient number, since it is larger than the sum of its proper divisors (60513274).

80684356 is a wasteful number, since it uses less digits than its factorization.

80684356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20171093 (or 20171091 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 80684356 is about 8982.4471053271. The cubic root of 80684356 is about 432.1121179614.

The spelling of 80684356 in words is "eighty million, six hundred eighty-four thousand, three hundred fifty-six".