80680442 has 4 divisors (see below), whose sum is σ = 121020666. Its totient is φ = 40340220.

The previous prime is 80680423. The next prime is 80680447. The reversal of 80680442 is 24408608.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80478841 + 201601 = 8971^2 + 449^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80680399 and 80680408.

It is not an unprimeable number, because it can be changed into a prime (80680447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170109 + ... + 20170112.

Almost surely, 2^80680442 is an apocalyptic number.

80680442 is a deficient number, since it is larger than the sum of its proper divisors (40340224).

80680442 is a wasteful number, since it uses less digits than its factorization.

80680442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40340223.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 80680442 is about 8982.2292333251. The cubic root of 80680442 is about 432.1051305921.

The spelling of 80680442 in words is "eighty million, six hundred eighty thousand, four hundred forty-two".